Amazon.com: Customer reviews: Casio Men's F28W-1 "Classic" Digital Watch
Got this F-28w today and used an extra Royale strap on it. It should fit it better as the strap gets worn a couple time, these straps need some breaking in usually.
Casio F-28W Review | WatchCrunch
Casio F-84W and F-28W - YouTube
Casio F-28W New to me, Super simple with just a 12/24hr toggle! : r/casio