Side-by-side comparison of specifications and features
Compare visual case presence and physical footprint on one shared wrist. Measure your top-down wrist width for a stronger result; lug-to-lug is used when the catalog has it.
Medium (6.7″)
Estimated top width: 56.7 mm
Preliminary range: 54.7–61.8 mm.
Watch A
Visual presence
ModerateCase covers 65% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 6.5 mm per side.
Watch B
Visual presence
ModerateCase covers 62% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 9.3 mm per side.
Proportional guide only: visual presence and physical footprint do not predict comfort. Weight, thickness, caseback shape, rigid lugs, strap stiffness, wrist-bone prominence, wearing tension, bezel design, and case curvature change how a watch actually wears. Non-round silhouettes use a verified family shape and catalog dimensions where available; missing case height or width is estimated from a conservative family aspect ratio.
Start with the specifications that meaningfully differ. Expand the complete table for reference details and missing-data context.
| Specification | Casio W-800H | Casio Classic |
|---|---|---|
| Pricing | ||
| MSRPF-91W is $26 less at MSRP | $49 | $23 |
| New PriceF-91W is $29.7 less based on the current snapshot | $57 | $27 |
| Used Price (High) | $49 | $79 |
| 30-Day Trend | ↓ -10.7% | ↑ +19.8% |
| Used Price Range | $20 - $49 | $20 - $79 |
| Identity | ||
| Style | Digital, Tool, Casual | Digital, Casual |
| Dimensions | ||
| DiameterF-91W is 1.8mm smaller | 37mm | 35.2mm |
| ThicknessF-91W is 4.9mm thinner | 13.4mm | 8.5mm |
| WeightF-91W is 16g lighter | 37g | 21g |
| Case | ||
| Water ResistanceW-800H adds 70m water resistance | 100m (recreational diving) | 30m (splash resistant) |
| Dial | ||
| Dial Color | Black | LCD |
2 fields are excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
Casio W-800H and Casio F-91W can overlap on price or use case, but the buying decision usually comes down to wrist presence versus easier fit, water-ready utility versus dressier everyday wear, entry price versus premium finishing or specs. Start with fit first — case width and lug-to-lug usually matter more than secondary features if wrist comfort is a concern.
Bottom line
Casio W-800H is the better all-round beater because it has a larger display, 100m water resistance, dual time, and a 10-year battery. Choose Casio F-91W when minimum size and weight matter more than durability and features.
Choose Casio W-800H when
Casio W-800H is a better fit for buyers who want more wrist presence, low-maintenance daily wear, digital styling.
Choose Casio F-91W when
Casio F-91W is a better fit for smaller wrists, low-maintenance daily wear, digital styling.
Movement and upkeep
Casio W-800H: quartz movement
Casio F-91W: quartz movement
Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.
Size and wearability
Casio W-800H: 37mm · 37g
Casio F-91W: 35.2mm · L2L 38mm · 21g
Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features.
Water resistance
Casio W-800H: 100m
Casio F-91W: 30m
Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.
Price and value
Casio W-800H: $57
Casio F-91W: $27
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Style and use case
Casio W-800H: digital
Casio F-91W: digital
Both lean into a similar digital use case — the choice is more about fit, features, and price than category.
Crystal and materials
Casio W-800H: acrylic crystal · resin
Casio F-91W: acrylic crystal · resin
Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.
Casio F-91W is often the value play at current pricing, while Casio W-800H makes more sense if you will use its extra features regularly.
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.
Prices change often, so compare the latest listings and condition options before you buy.
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Casio W-800H
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Casio F-91W
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Casio F-91W — at 8.5mm thick versus 13.4mm it sits flatter, which matters more than the near-identical case width here.
Casio W-800H — it is rated 100m versus 30m, which is the difference between swimming confidently and only handling splashes.
Casio F-91W is the value pick at roughly $30 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.
Evidence & Method
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