What is the difference between the WB104 or WB201?

WB104 is taller wristband, and
WB201 is shorter wristband

In the picture below, top is WB104 and bottom is WB201

WB104 Size is about 3.15 inch x 3.94 inch / 8 cm x 10 cm

WB201 Size is about 2.76 in x 2.36 in / 7cm x 6cm

 (Click to view larger image)