This Sliding Patio Door Roller has two 1-1/4 inch (31.8 millimeter) diameter Steel ball bearing rollers.
The steel housing assembly is 11/16 inches (17.5 millimeters) wide and 1-5/16 inch (33.3 millimeters) tall.
This unit is used by Phillips and other door manufacturers.
There is another roller (13261) with a 1 tall housing that looks like this one.

Housing Tab Style: Unique housing
Roller Diameter: 1-1/4-inch
Housing Height: 1-9/32 inch
Housing Width: 11/16 inch
Roller Edge Type: Concave
Roller Material: Steel
Installation Screw: 1/4-20 Machine Thread
Includes one roller assembly.

Related items:
13261 - Keller 1 inch tall housing
13262N - Tandem Roller / Nylon Wheel

Sold each, priced each