I have two cabinets with lifts. They are custom made Amish, one maple and one walnut. The walnut one was made for a special machine, Jaonme 1600 P. The base on that one is 20 inches and will not fit in the other cabinet. I took this Janome off a mid arm so it is just plain longer. There is a sweet size and it might be 16 inches, not sure. You can always make a smaller machine go into a bigger hole, but not the other way around. I'll post some pictures later today.