Approximately 15-1/2in in diameter, total circumference is approximately 17-1/2in

Singer 3270, 4325, 4620, 4830, 4832, 5017, 5028, 5040, 5050, 5062, 5705, 5710, 57817, 57820, 57825, 5802, 5805, 5806, 5808, 5810, 5825, 5830, 5838, 6211, 6212, 6214, 6215, 6217, 9802, 9803, 9805, 9806, 9808, 9810, 9812, 9814, 9816, 9818, 9824, 9828, 9832, 9836, 9936,...

Singer 4552, 4610, 4622, 5910, 6233, 6252, 7028, 7033, 7037, 9005, 9008, 9010, 9020, 9030, 9034, 9044, 9110, 9113, 9130, 9210, 9410, 9416, 9420, 9423, 9432 - Altnerative number 313185-451, 316070-001

Singer 1105, 1116, 1120, 1130, 1525, 1725, 2250, 2259, 2263, 3116, 3321, 8280 . Viking E20 Alternative number 416156601

Also Singer 5800 series

Singer 4617, 4623, 6234, 6235, 6267, 6268, 7057, 7060, 9113, 9117, 9124, 9133, 9137, 9143, 9217, 9224, 9240 (originally part discontinued by vendor)

Also White 8910

Sgr 4411, 4423, 4432, 4452, 44S, 5511, 5523, 5554 -

Singer 2010 Newer Version (2009), 3337, CE677 Elite 

Also 610, 620, 630