20x30x7 mm used as a front hub bearing, specifically for Mavic and Profile Racing. It is also used by Trek as a pivot bearing

27.5x37x7 mm, used as a front hub bearing, specifically in SRAM Predictive Steering front hubs for the RS-1 suspension fork.

1/4"x5/8"x0.196" for hubs, pedals and as pivot bearing

25x37x7 mm, the most common use for this bearing is as a direct replacement bearing for Shimano external cup BBs when using the plastic Shimano bearing insert. If you wish to avoidsing the plastic insert MR 2437 is the correct bearing for the job

12x24x6 mm used as a hub bearing for some quick-release hub designs, pedals

9x22x7 mm used as freehub bearing, particularly by Mavic.