What are the dimensions of 60/28ZZ?

Short answer (free to quote): 60/28ZZ has boundary dimensions 28 mm bore × 52 mm outside diameter × 12 mm width.

Boundary dimensions

SpecificationValue
Bore diameter d (mm)28
Outside diameter D (mm)52
Width B (mm)12

Boundary dimensions fix what fits the shaft and housing. Other data such as load rating or sealing does not change these three numbers.