Size reference
Contact lens case size chart by brand and capacity
Use this chart to match your contact lens brand to the right case size. It shows how many daily lenses fit in Small, Medium, and Large cases, plus a recommended Sturdysight size and typical pack depth for dozens of daily disposable and replacement-cycle brands. When you are unsure, Medium is the safe default because it is guaranteed to hold at least 30 lenses for every brand.
Case size capacity at a glance
Every Sturdysight case ships as a 2-pack of waterproof high-strength plastic cases, clearly labeled L and R. The difference between sizes is how many daily disposable lenses each one stages before you refill.
A compact, travel-first case for one wearer who refills from a home supply before the case empties.
View SmallThe safe default. It is guaranteed to hold at least 30 lenses for every brand, so it covers a full monthly refill window with room to spare.
View MediumA stock-up case for a full quarter, two wearers sharing a setup, or anyone who would rather refill less often.
View LargeContact lens case size chart by brand
Find your brand below for the recommended Sturdysight size and the typical depth of that brand's daily packs. Of the 59 brands tracked here, 30 usually fit a Small case and 29 fit Medium for a normal one to two week buffer. The recommendation is a planning default for a single wearer, so move up to Large when you stock up for a full quarter or share the case with another wearer.
| Contact lens brand | Recommended size | Typical pack depth | Brand guide |
|---|---|---|---|
| 1-DAY ACUVUE MOIST | Medium | 5.7 mm | 1-DAY ACUVUE MOIST case guide |
| 1-DAY ACUVUE OASYS | Medium | 5.9 mm | 1-DAY ACUVUE OASYS case guide |
| Acuvue | Medium | 5.8 mm | Acuvue case guide |
| ACUVUE DEFINE | Small | 5.3 mm | ACUVUE DEFINE case guide |
| ACUVUE OASYS for ASTIGMATISM | Small | 5.3 mm | ACUVUE OASYS for ASTIGMATISM case guide |
| ACUVUE OASYS MAX 1-Day | Medium | 6.0 mm | ACUVUE OASYS MAX 1-Day case guide |
| ACUVUE OASYS MAX 1-Day Multifocal | Medium | 6.0 mm | ACUVUE OASYS MAX 1-Day Multifocal case guide |
| ACUVUE OASYS MULTIFOCAL | Small | 5.3 mm | ACUVUE OASYS MULTIFOCAL case guide |
| ACUVUE VITA | Small | 5.2 mm | ACUVUE VITA case guide |
| AIR OPTIX | Small | 5.3 mm | AIR OPTIX case guide |
| AIR OPTIX Colors | Small | 5.2 mm | AIR OPTIX Colors case guide |
| Artiral | Small | 5.1 mm | Artiral case guide |
| Avaira Vitality | Small | 5.2 mm | Avaira Vitality case guide |
| Bausch + Lomb Horizon | Small | 5.1 mm | Bausch + Lomb Horizon case guide |
| Bausch + Lomb ULTRA One Day | Medium | 5.9 mm | Bausch + Lomb ULTRA One Day case guide |
| Bella | Small | 5.2 mm | Bella case guide |
| Biofinity | Small | 5.1 mm | Biofinity case guide |
| Biofinity Energys | Small | 5.2 mm | Biofinity Energys case guide |
| Biofinity Multifocal | Small | 5.2 mm | Biofinity Multifocal case guide |
| Biofinity Toric | Small | 5.2 mm | Biofinity Toric case guide |
| Biomedics | Small | 5.1 mm | Biomedics case guide |
| Biotrue ONEday | Medium | 5.8 mm | Biotrue ONEday case guide |
| Biotrue ONEday for Astigmatism | Medium | 5.9 mm | Biotrue ONEday for Astigmatism case guide |
| Biotrue ONEday Multifocal | Medium | 5.9 mm | Biotrue ONEday Multifocal case guide |
| clariti 1 day | Medium | 5.8 mm | clariti 1 day case guide |
| clariti multifocal | Small | 5.2 mm | clariti multifocal case guide |
| clariti toric | Medium | 5.8 mm | clariti toric case guide |
| DAILIES AquaComfort Plus | Medium | 5.8 mm | DAILIES AquaComfort Plus case guide |
| DAILIES Colors | Small | 5.2 mm | DAILIES Colors case guide |
| DAILIES Toric | Medium | 6.0 mm | DAILIES Toric case guide |
| DAILIES TOTAL1 | Medium | 6.1 mm | DAILIES TOTAL1 case guide |
| EverColor | Small | 5.2 mm | EverColor case guide |
| EyeDeal | Medium | 5.8 mm | EyeDeal case guide |
| FreshKon | Medium | 5.7 mm | FreshKon case guide |
| FreshLook | Small | 5.2 mm | FreshLook case guide |
| HOYA 1day | Medium | 5.7 mm | HOYA 1day case guide |
| INFUSE | Medium | 5.9 mm | INFUSE case guide |
| Menicon 1day | Medium | 5.8 mm | Menicon 1day case guide |
| Menicon Premio | Small | 5.2 mm | Menicon Premio case guide |
| Miru 1day | Medium | 5.8 mm | Miru 1day case guide |
| Moody | Small | 5.1 mm | Moody case guide |
| MyDay | Medium | 5.9 mm | MyDay case guide |
| MyDay Multifocal | Medium | 5.9 mm | MyDay Multifocal case guide |
| MyDay Toric | Medium | 5.9 mm | MyDay Toric case guide |
| OLENS | Small | 5.2 mm | OLENS case guide |
| PRECISION1 | Medium | 5.7 mm | PRECISION1 case guide |
| PRECISION1 for Astigmatism | Medium | 5.9 mm | PRECISION1 for Astigmatism case guide |
| PRECISION7 | Small | 5.3 mm | PRECISION7 case guide |
| Proclear | Small | 5.0 mm | Proclear case guide |
| PureVision2 | Small | 5.1 mm | PureVision2 case guide |
| SEED | Medium | 5.7 mm | SEED case guide |
| SEED 1dayPure | Medium | 5.7 mm | SEED 1dayPure case guide |
| Sincere | Small | 5.1 mm | Sincere case guide |
| SofLens 59 | Small | 5.0 mm | SofLens 59 case guide |
| SofLens Daily Disposable | Medium | 5.8 mm | SofLens Daily Disposable case guide |
| Solotica | Small | 5.2 mm | Solotica case guide |
| TOTAL30 | Small | 5.3 mm | TOTAL30 case guide |
| ULTRA | Small | 5.2 mm | ULTRA case guide |
| Water Gradient | Medium | 5.9 mm | Water Gradient case guide |
Pack depth values are typical planning estimates. Real blister depth can vary by market, prescription, and packaging revision, so confirm against one real box if you are staging a tight buffer.
How to read this size chart
A contact lens case for daily disposables has one core job: hold your unopened blister packs in a clean, visible, organized way so you always know how many days of lenses you have left. The right size is the one that stages the supply you actually want to carry without becoming a hidden bulk bin. That is why this chart starts from your brand and your refill habits rather than from a single number.
Start by finding your brand in the chart above. The recommended size column reflects the typical blister format for that brand and a normal one to two week active buffer. The typical pack depth column is the second signal: deeper packs take up more vertical room, so two brands with the same daily schedule can land on different sizes. The brand guide link opens a page with more detail on that specific brand, including how the pack geometry affects fit.
Treat the recommendation as a starting point, not a hard limit. If you stage more than a month at a time, share the case with a partner, or like to keep a generous backup buffer, round up one size. If you mostly travel light and refill from a home supply, you can usually drop to the smaller option. The size finder tool walks you through those adjustments in a few clicks.
What determines case capacity
Three things decide how many lenses fit in a case. The first is the physical size of the case, which is fixed once you pick Small, Medium, or Large. The second is the depth of your daily disposable blister packs, which is why this chart tracks pack depth per brand. The third is how you organize the case: keeping left and right lanes separated and packs flat lets you fit the full rated capacity, while loose or stacked packs waste space.
Daily disposable blisters in this chart range from roughly 5.0 mm to 6.1 mm deep. That sounds like a small spread, but it adds up across a month of lenses. A brand at the shallow end leaves more room for additional packs, so a Small case comfortably covers a month. A brand at the deep end fills the same space faster, which nudges the recommendation toward Medium so you do not have to cram packs in. Monthly and reusable lenses need far less daily staging because you are not carrying a fresh pair for every day, so they often fit Small even when their pack depth is moderate.
Small vs Medium vs Large in plain terms
The Small case holds about 20 to 30 daily lenses. That is roughly a month for one wearer, which makes it the compact, travel-first choice. It fits a carry-on, a desk drawer, or a gym bag, and it works best when you refill from a larger home supply before it runs empty. If portability is your top priority, Small is the right call.
The Medium case holds about 30 to 40 daily lenses and is the best seller for a reason. It is guaranteed to hold at least 30 lenses for every brand on the market, so it covers a full monthly refill window with room to spare and removes the guesswork. If you are unsure which size to pick, or you wear a brand with deeper packs, Medium is the lowest-risk choice. It still stays compact enough for a bathroom counter or a bag.
The Large case holds about 60 to 90 daily lenses, which is a full quarter of supply. Its transparent design makes it easy to see how many lenses you have left at a glance, so it suits people who would rather buy in bulk and refill less often. It is also a practical pick for two wearers sharing one setup, since the L and R lanes keep each person organized.
Sizing for travel
For travel, count one daily lens for each planned day and add a small buffer in case plans change or a lens tears. For most trips, the Small case is the easiest to pack because it slips into a carry-on or toiletry pouch without taking up much room. For longer trips of several weeks, or when you share a case with a partner, Medium gives you the extra capacity without much added bulk. The travel kit builder tool can size the full kit, including how much solution to pack for reusable lenses under carry-on liquid rules.
Five sizing mistakes to avoid
- Buying the largest case by default. A case that is too big becomes a hidden bulk bin and makes it harder to see when you are running low. Size to the supply you actually want to stage.
- Buying the smallest case to save space, then constantly running out. If you refill from the case rather than a separate home supply, give yourself a full month with Medium.
- Ignoring pack depth. Two brands with the same daily schedule can need different sizes because their blisters are deeper or shallower. Check the chart instead of guessing.
- Mixing left and right packs in one lane. Use the labeled L and R lanes so you never lose track of which eye a pack belongs to, especially if your prescription differs by eye.
- Saving worn daily lenses in the case to reuse. A daily disposable case is for organizing unopened packs, not for storing used lenses. Follow your eye-care provider's instructions for worn lenses.
Frequently asked questions
What size contact lens case do I need?
Match the case to how many days of daily disposable lenses you want staged at once. A Small case holds about 20 to 30 lenses, which is roughly a month for one wearer. Medium holds 30 to 40 and is guaranteed to fit at least 30 lenses for every brand, which makes it the safe default. Large holds 60 to 90 lenses, which is a full quarter or a shared setup for two wearers. When you are unsure, Medium is the lowest-risk pick.
How many contact lenses fit in a case?
Capacity depends on the case size and the depth of your daily disposable blister packs. A Sturdysight Small case fits about 20 to 30 daily lenses, Medium about 30 to 40, and Large about 60 to 90. Brands with slightly deeper blisters take up a little more room, which is why the chart on this page lists a recommended size per brand rather than a single number for everyone.
Does the case size change by contact lens brand?
The case itself does not change, but the recommended size can. Daily disposable blister packs vary in depth from roughly 5.0 mm to 6.1 mm depending on the brand. Deeper packs and longer refill buffers point toward Medium, while monthly replacement lenses and shorter buffers often fit Small comfortably. The chart on this page shows the typical pack depth and recommended Sturdysight size for each brand.
What is the difference between Small, Medium, and Large?
Small is compact and travel-friendly and holds about a month of daily lenses for one wearer. Medium is the best seller because it guarantees at least 30 lenses for every brand and stays small enough for a counter, drawer, or bag. Large is a transparent stock-up case that holds a full quarter so you refill less often. All three are waterproof high-strength plastic, clearly labeled L and R, and ship as a 2-pack.
Which case size is best for travel?
Small is the most travel-friendly size because it is compact and easy to slip into a carry-on, a toiletry pouch, or a work bag. Pack one daily lens per planned day plus a small buffer, and refill from your home supply before the case runs low. If you travel for several weeks at a time or share a case with a partner, Medium gives you more room without much extra bulk.
How do I read the size chart on this page?
Find your contact lens brand in the alphabetical chart. The recommended size column tells you which Sturdysight case usually fits that brand best, the typical pack depth column shows how deep that brand's blisters tend to run, and the link opens a brand-specific guide. The recommendation is a planning default, not a strict limit, so round up a size if you stage a longer buffer or share the case.
Why does pack depth matter for case capacity?
Daily disposable lenses ship in sealed blister packs, and the case has to hold those packs without crushing them. Deeper blisters take up more vertical room, so a brand with a 6.0 mm pack will fit fewer packs in the same case than a brand with a 5.1 mm pack. That is why two brands with the same daily schedule can land on different recommended sizes.
Can one case hold more than one brand?
Yes. The case does not care which brand you store as long as the packs fit. If you wear one brand in each eye or you are switching brands, use the clearly labeled L and R lanes to keep them separated, and size up to Medium or Large if the combined buffer is larger than a single month.
What size do I need for monthly or reusable lenses?
Monthly and reusable replacement lenses usually need less daily staging than daily disposables because you are not carrying a fresh pair for every day. Small is often enough for monthly wearers. Use this chart and your refill habits as the guide: if you keep a longer backup buffer or share storage, move up to Medium.
Where can I buy the right size?
Every Sturdysight size is available on Amazon as a 2-pack. Once the chart points you to a size, open that product page for photos and details or go straight to the Amazon listing to order. Medium is the most popular choice and the safest pick if you are still deciding.
Found your size? Get the case.
Every Sturdysight size is a waterproof, L and R labeled 2-pack on Amazon. Medium is the most popular pick and the safest choice if you are still deciding.