Long one (bridge): Dimensions (Interior) : 101.9mm x 16.4mm ; Interior height: 18.2mm Mounting screw spacing : 49mm x23.5mm
Short one(neck): Dimensions (inside) : 98.5mm x 16.4mm ; Interior height: 18.2mm Mounting screw spacing : 47mm x23.5mm
These pickup covers are great replacement or repair parts for 4 String bass guitar, in 2 different sizes, short one for neck pickup and the long one for bridge pickup.