Endura Plate Dimensions:

Standard Midi
1 Gang 4.5" x 2.75"
2 Gang 4.5" x 4.562"
3 Gang 4.5" x 6.375"
4 Gang 4.5" x 8.187"
5 Gang 4.5" x 10"
6 Gang 4.5" x 11.812"

 1 Gang 5.06" x 3.25"
2 Gang 5.06" x 5.12"
3 Gang 5.06" x 6.95"
4 Gang 5.06" x 8.75"