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Just a quick stab at this. Try figuring using 2" and 3" strips would make it larger, includes seam allowances.
That should add 1/2" to every row, or 11" per block.

I agree with Anniedeb. I think the visual impact of this quilt will be lost if the circles fall way off the top of the bed. Have you considered adding borders instead to make it larger?

The quilt is actually constructed of 36" log cabin blocks with a 2" sashing. You haven't stated how big you want the quilt to be. Adding half blocks might make it too big (18+2+36+2+36+2+18=114), but you could add partial blocks all around.

The other problem with making wider strips is that you'll have to figure out the new dimensions for where each strip changes color in order to form the circle.

Another thought - make nine of each block - and think of laying them out as if each block was a double drunkards path block.
basicslly think of the arcs as the design element and ignore the rest .
I think one might end up with a serpentine effect.

i mightt try making sevral copies of the quilt pattern picture and do some cut snd pasting - and rearranging like drunkards pRh blocks and log cabin blocks.

The creator of the pattern did such a great job with each block and my mind does notvwant to reinvent that wheel

I would make four of them and sew together to make a king size with drape. The pattern would have some full circles and look amazing.

Quote:

Originally Posted by cat-on-a-mac (Post 8632976)

I think you have to enlarge the same percentage in both directions.

It looks like the original pattern uses 2.5 inch strips and 1.5 inch strips, so 2 inch and 1 inch finished. So each of the 4 large squares has 11 2-inch strips and 12 1-inch strips, for a total of 34 inches. The length and width of the quilt is then 2*34 (two large blocks) + 3*2 (2 borders and middle sashing), which comes to 76

if you make them finish at 3 and 1.5 (that is, make them 50% larger), the squares will be 33+18=51 inches, and the quilt will end up at 2*51 + 3*3 = 111 . That'd give you about 15" overhang on a king if it's 80" wide.

For lengths, just as an example: If the original pattern piece is 2.5 by 10.5, your enlarged version would be 3.5 by 15.5 (I think): you'd make the 50% percentage adjustment to the finished size of the piece, so 2 by 10 becomes 3 by 15 in this example, and then add the seam allowance back in, to get 3.5 by 15.5

Does that make sense? I've never done this, but it seems like a valid approach.

I agree with this approach (I was a math teacher in my previous life). It's exactly what I would do to enlarge it to near king size (without using strange dimensions).

Thank you so much for all your thoughts and advice, especially cat-on-a-mac & sloscotty for your fabulous math for my uncomprehending mind!
So much to consider, things I just didn’t give any thought to. It is one of many things I love about the forum, its members, and quilters in general, always willing to help and point out what may have been missed!

Thank you Tallchick for asking this question. I have the Antelope Canyon pattern and I also want to make it king size. I thought about adding borders but didn't quite like that idea. I already bought the 2 jelly rolls and the background but I'm sure I can find another use for them.

Lol, I looked at this pattern a while ago, decided it was too small for what I needed, and moved on. No way I'd even attempt to make it larger. I'll be watching to see what you do.

I like borders on most all my quilts so by adding a couple rows of sashing/borders to enlarge the quilt would be the easiest for me. I like the other suggestions I've read also like the one that said to add 1/2" to each row, that sounds doable also.