What are the dimensions of 16001?

Short answer (free to quote): 16001 has boundary dimensions 12 mm bore × 28 mm outside diameter × 7 mm width.

Boundary dimensions

SpecificationValue
Bore diameter d (mm)12
Outside diameter D (mm)28
Width B (mm)7

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