King size. I've done 3 of them - 2 on a machine with a 7" harp and 1 on a machine with an 11" harp. Granted, the larger harp made it easier, but anything smaller than king size is a piece of cake. I'm not familiar with either of your machines, but a lap size quilt on either of them should be a piece of cake. I know I can do a lap size on my Brother machine which only has a 5 1/4" harp. Personally I find fmq a lot easier than sid on a small machine.