Large 
Height: 3.5 in (8.89 cm) 
Width: 3 in (8.89 cm)
Depth: 1.75 in (4.445 cm)

Medium 
Height: 3.25 in (8.255 cm)
Width: 2.5 in (6.35 cm)
Depth: 1.5 in (3.81 cm)

Small 
Height: 2.5 in (6.35 cm) 
Width: 2.25 in (5.715 cm)
Depth: 1.5 in (3.81 cm)