This motor belt measures 10.5 inches by .17 inches.
Guaranteed to fit Bernina Sewing Machine Models:
707, 708, 709, 717, 718, 719, 727, 728, 729, 801, 801S, 802, 802S, 803, 803S, 807, 808, 809, 810, 811, 817, 818, 819, 900
Alternate Part Number: 305.158.13, 305.354.03