This should help you out a little

Metric Dimensions
Chain Pitch Width Roller Diameter
415 12.70mm 4.88mm 7.75mm
420 12.70mm 6.35mm 7.75mm
428 12.70mm 7.75mm 8.51mm
520 15.88mm 6.35mm 10.16mm
525 15.88mm 7.85mm 10.16mm
530 15.88mm 9.53mm 10.16mm
532 15.88mm 9.53mm 11.10mm
630 19.05mm 9.53mm 11.91mm
632 19.05mm 9.66mm 12.68mm