I must confess, I haven't made a bed-sized quilt since 1971. For functional quilts, I make mostly lap/couch size in the 60" to 72" range, always square because that's how I prefer to design. My art quilts range from quite small (mounted on artist's canvas) up to lap quilt size; the 30 to 48 inch range is my favorite. I like my quilts to be seen, not kept where they are only used in the dark and with closed eyes. :o

Traditional quilts, I've made all sizes. There's 2 beds in our house and 2 in my daughters. They all have several options. There's plenty of lap quilts, table runners, placemats, large wall hangings. I've made things for my extended family and some friends.

I've transitioned to art quilts, almost exclusively wall hangings. Sometimes the size is determined my the materials. I use quilter's grid often, it's 42" wide (I think), so, one measurement is less than that. I've determined size by the width of fabric to use on the back-no pieced back. And I've a stash big enough to never buy another piece of fabric, so it's got to be pretty important to buy 108" wide fabric. Most wall space isn't especially large so 3x4' is a large wall hanging.

Now I'm selling quilts. Things under $65 sells better, with -$commission that's about 12x12" mounted. I too have been mounting on canvas, so I figure about the size then find a canvas close to that size and that's what it will be. The same with foam core and picture frames-the wall hanging will fit a standard size to avoid custom costs.

Sometimes, rarely, I'll have a design that tells me what size it is when the design statement is complete, then it hanges as a quilt-no custom fitting.

These are my reasons. Works for me

I've made mostly lap sized quilts, but my "lap size" is actually somewhere between twin and double, lol. They will cover a double bed with no drop or a twin with about a 6-8" drop. I make them big because I want it to be big enough to cuddle with the hubby from shoulders to underneath my feet. I've made one queen quilt with about a 8-10" drop for my bed and am starting another one for my bed. I've made lots of crib sized baby quilts to give as gifts and a few wall quilts, but mostly oversized lap quilts.

It looks like the consensus is mostly lap size quilts and I probably do large lap sizes to twins most of the time too. I have made a few that will fit our queen bed and the double in the spare room plus quite a few wall hangings so I can change them out seasonally. And for the babies smaller ones of course. I quilt my own on my DSM so no king sized quilts for me. I actually quilt all my queens by hand. I don't think I could wrangle all of that bulk like some of you brave hearts do. I'm amazed at the very thought of that!

I like your math! Do you do different blocks or do you stay with the tried and true? It certainly makes it easier to keep it the same size.

Thank you everyone for your wonderful and informative comments and information. We are individuals aren't we. And our likes and artistic abilities really come to the front when deciding what turn or twist our inspired quilting takes us. I feel fortunate to be a quilter and to be part of such a marvelous group of talented folks.

This past year, I've been working on all queen sized or over-sized queen quilts. I do quilt some smaller stuff on occasion for a quick gift.