I made a king size. The center has 9 20 x 20 inch blocks then large borders all around. I sashed & quilted the center blocks, quilted the borders separately then added them to the sides of the quilted center blocks. All on a domestic machine. I use it on my bed everyday.

I have done 120 x 120 on my Viking Sapphire 830 domestic, I meander and start at the outside and work in - it has worked for me on over 50+ big quilts. Good luck the extra 4 inches all the way around will seem like a lot but you can certainly do it!

120x120 !!!!

I have started making all my quilts at least a queen but mostly kings. Everyone I would give one to has big beds with big matresses so to use them for a spread they need to be big. I just finished a top that was king and they are certainly a lot of work. When I got the borders on I ached all over from handling it and moving it around.

122x122. Yes quilt the center and then add the borders. Remember quilting will add more weight so for usage you might not want to over quilt since you mentioned it was already heavy because of the fabric. Can't wait to see it.

Largest quilt I have made was 108 x 108, but didn't have to quilt it on a DSM. Sounds like a lot of hard work! Would love to see pics as you are progressing.

The largest I have made is 108x 108.

i would definitly recommend either quilt as you go- or quilt it in sections which you then join---something that large will be impossible to reach the center of on a domestic machine- few long-arms are even large enough to (comfortably) do one that large.
the largest quilt i ever made was my daughter's wedding quilt- it was 126" X 140"! i paid ALOT to have it long arm quilted (as in over $400)

I'm working on my largest right now but it is dinky compared to the other posts. Its only 72 x 84 but plenty big for me to machine quilt on my babylock.

First quilt I ever made 100 x 120 with over 2000 half square triangles. . .and I trimmed every one of those little devils!!