NEW SINGER SLIDE PLATE, REAR #55503 

LENGTH  43MM / 3 1/2"
BACK WIDTH  82.5 / 1 11/16"
FRONT WIDTH  1.4MM / 1 1/4"

Guaranteed to fit Singer Sewing Machine Models:
127, 27, 127K, 127K1, 127K2, 127K3, 127K4, 127K201, 127K212, 128K

This Slide Plate is 3 1/4" long and 1 5/8" wide.