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
CompactCase covers 49% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 11.8 mm per side.
Watch B
Visual presence
BoldCase covers 75% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 5.3 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.
Start with the specifications that meaningfully differ. Expand the complete table for reference details and missing-data context.
| Specification | Seiko 5 Sports | Seiko 5 Sports GMT |
|---|---|---|
| Pricing | ||
| MSRP5 Sports is $50 less at MSRP | $350 | $400 |
| New Price5 Sports is $271 less based on the current snapshot | $299 | $570 |
| Used Price (Low)5 Sports is $225 less at the low end | $150 | $375 |
| Used Price (High) | $390 | $931 |
| 30-Day Trend | ↑ +1.5% | ↑ +3.4% |
| Used Price Range | $150 - $390 | $375 - $931 |
| Identity | ||
| Style | Sports, Casual | Sports, Tool |
| Dimensions | ||
| Diameter5 Sports is 14.5mm smaller | 28mm | 42.5mm |
| Thickness5 Sports is 2.4mm thinner | 11.2mm | 13.6mm |
| Weight5 Sports is 92g lighter | 69g | 161g |
| Lug Width | 14mm | 22mm |
| Lug to Lug | 33.1mm | 46mm |
| Case | ||
| Bezel | Fixed | Bidirectional 24-hour |
Seiko 5 Sports 28mm and Seiko 5 Sports GMT can look close on a spec sheet, yet the tradeoffs that matter most are usually wrist presence versus easier fit. They both touch the sports use case, so smaller spec differences can matter more than brand preference.
Bottom line
Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features. Choose Seiko 5 Sports 28mm if you want a smaller case footprint on the wrist; choose Seiko 5 Sports GMT if you prefer more dial presence and a larger case feel.
Choose Seiko 5 Sports 28mm when
Seiko 5 Sports 28mm is a better fit for smaller wrists, mechanical-watch enthusiasts, sports styling.
Choose Seiko 5 Sports GMT when
Seiko 5 Sports GMT is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, sports styling.
Movement and upkeep
Seiko 5 Sports 28mm: automatic movement
Seiko 5 Sports GMT: automatic movement
Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.
Size and wearability
Seiko 5 Sports 28mm: 28mm · L2L 33.1mm · 69g
Seiko 5 Sports GMT: 42.5mm · L2L 46mm · 161g
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
Seiko 5 Sports 28mm: 100m
Seiko 5 Sports GMT: 100m
Water resistance is similar on paper, so focus on fit, features, and price instead.
Price and value
Seiko 5 Sports 28mm: $299
Seiko 5 Sports GMT: $400
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
Seiko 5 Sports 28mm: sports
Seiko 5 Sports GMT: sports
Both lean into a similar sports use case — the choice is more about fit, features, and price than category.
Crystal and materials
Seiko 5 Sports 28mm: Hardlex crystal · steel
Seiko 5 Sports GMT: Hardlex crystal · steel
Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.
Seiko 5 Sports 28mm is often the value play at current pricing, while Seiko 5 Sports GMT 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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Seiko 5 Sports
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Seiko 5 Sports GMT
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Seiko 5 Sports 28mm — it is 33.1mm lug-to-lug versus 46mm, and lug-to-lug is what decides whether a watch overhangs a smaller wrist.
They are rated the same, so water resistance will not decide this. Choose on strap material and how much you mind scratching the case.
Seiko 5 Sports 28mm is the value pick at roughly $101 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
This page currently relies on normalized catalog fields and calculated differences. No external reviewer observation is used in its verdict.
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