Seiko 5 Sports Field GMT (2026) 39.4mm

How it wears

Wears larger than its 39.4 mm case suggests

Seiko 5 Sports Field GMT (2026) 39.4mm measures 47.9 mm lug-to-lug on a 39.4 mm case, a lug-to-lug ratio of 1.22 against a database median of 1.18. That span is longer than 62% of the 8,093 watches in this database and longer than 73% of the 405 Seiko watches listed.

A flat wrist width of 54 mm (2.13 in) or more keeps it in the balanced range, and from 64 mm (2.52 in) it starts to look compact. Below 47.9 mm (1.89 in) the lugs are likely to overhang the wrist. Flat wrist width is measured straight across the top of the wrist, not around it.

At 13.6 mm thick it is on the thicker side, thicker than 76% of the watches with a listed thickness.