
13 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the Casio GBA-400 is the Casio GA-010 ($135) — same family (G-Shock) and Quartz. If price is the constraint, the Casio GD-100 at $99 (vs $200 for the GBA-400) covers most of the same brief. Stepping up, the Casio GG-B100XM ($440) is where the same idea goes with a bigger budget.
Established brands covering the same brief at a comparable price: same case size, similar movement family. Often the deciding click for a new buyer.
If the price is the only thing keeping you off this watch, these get you most of the way there for less.
Where the same idea goes when budget isn't the constraint: luxury upgrades and step-ups.