This buttplate is for the Model 37A single shot shotgun. It measures 5.16" x 1.57"
Dimensions / Sizes for the Winchester Model 37A Buttplate;
5 5/32" x 1 19/32"
3 15/32" between screw holes (c/c)
3/16" from heel to top screw hole
1 11/32" wide across center of screw hole @ toe
