The width of the dovetail is 1". The overall width of guide is 1 7/8". From top to bottom is 1 3/8". Having trouble finding a replacement.
Casey from SWISCO responded:
December 30, 2020
Hello, thank you for writing in. I'm afraid we don't have an exact match for your drawer guide, but take a look at our 32-123. The adjustable opening works for a variety of track sizes.