The window slot is 9/16ths at the lip and widens to hold the housing to approx 10/16ths. Wheel diameter is 23/32nds or possibly as small as 11/16ths. Depth is approx 1in. Original was likely a steel bearing.
West coast Florida, likely PGT Windows approx 1982.
Paul from SWISCO responded:
October 26, 2020
Hello,
Take a look at our 87-001 Crossly roller and see how it compares to yours. Thanks for posting!