Casio Band Holder

Band holder for Casio DW-5600E.
Inner dimensions for v4 are 21mm L x 5mm W x 14mm H.
Inner dimensions for v1 are 21mm L x 6mm W x 13mm H.

V4 is rounded where it touches the wrist, and the inner width is slightly smaller. This makes it more difficult to put on the watch, but it stays in place now instead of sliding around like v1 did.
I've been using V4 for a couple months now. It holds up well. It is comfortable, but it does leave slight marks on the wrist. The rounding was made based off of my wrist, so it might not be as comfortable on different body types.