I measured what I have (but not the two new plastic wonders, elna and singer).
Circumference:
Singer Patcher 3.75"
Singer 222 7.25"
Viking 21A 8.75" (this is the oldest of the group, not counting the patcher)
Bernina 530 9"
Viking 6570 9.5"
Viking 990 10"
Pfaff 2140 10.25" (this is the newest of the group)
All but the two Singers are multi function machines. The last two are electronic with step motors, the rest are mechanical.
Last edited by Macybaby; 03-18-2015 at 10:20 AM.