You really need to pop off the hub to check. Some are straight and some are tapered.
1", 1-1/16", 1-1/8", 1-1/4" are common sizes for straight bearings.
1-1/16 x 1-3/8" is common for tapered, but sometimes it's 1-1/4" x 1-3/8" or other.
It is SO much easier to pop it off and determine...