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# Thread: need help enlarging a pattern

1. I was just reading that someone took a pattern from Karen Comb's book Celtic Illusions and enlarged it. The pattern is for a 24" wall hanging, and she enlarged it to 72". Not by making more blocks, just enlarged the whole thing. How would that be done? Thanks

2. Enlarging from 24" to 72" is simply three times bigger. For every piece in the pattern, subtract the ½" seam allowance from both the length and the width, multiply both by three, then add the seam allowance back to each.

For example, say there is a cut piece in the pattern that is 2½" x 4½". You would subtract the seam allowances (getting 2" x 4" ), multiply by three (getting 6" x 12" ), and add back the seam allowances (getting 6½" x 12½" ). So the new measurement for cutting that piece would be 6½" x 12½". Do that for all the pieces in the pattern.

Probably the best way to keep track of it would be to make a list of all the pattern measurements in one column and then all the enlarged measurements beside them in a second column.

3. Originally Posted by ghostrider
Enlarging from 24" to 72" is simply three times bigger. For every piece in the pattern, subtract the ½" seam allowance from both the length and the width, multiply both by three, then add the seam allowance back to each.

For example, say there is a cut piece in the pattern that is 2½" x 4½". You would subtract the seam allowances (getting 2" x 4" ), multiply by three (getting 6" x 12" ), and add back the seam allowances (getting 6½" x 12½" ). So the new measurement for cutting that piece would be 6½" x 12½". Do that for all the pieces in the pattern.

Probably the best way to keep track of it would be to make a list of all the pattern measurements in one column and then all the enlarged measurements beside them in a second column.
Thanks! That makes perfect sense. :D

4. since i'm lazy, i would tape the original to a window, tape a paper over it and trace. keep the original, but cut the copy into 9 pieces. remove the seam allowance. take the pieces to a copy store and enlarge each piece 3x. add the allowances back and tape the paper pattern together.

5. Originally Posted by ghostrider
Enlarging from 24" to 72" is simply three times bigger. For every piece in the pattern, subtract the ½" seam allowance from both the length and the width, multiply both by three, then add the seam allowance back to each.

For example, say there is a cut piece in the pattern that is 2½" x 4½". You would subtract the seam allowances (getting 2" x 4" ), multiply by three (getting 6" x 12" ), and add back the seam allowances (getting 6½" x 12½" ). So the new measurement for cutting that piece would be 6½" x 12½". Do that for all the pieces in the pattern.

Probably the best way to keep track of it would be to make a list of all the pattern measurements in one column and then all the enlarged measurements beside them in a second column.
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Thanks for this info my daughter wants me to make a twin size quilt and the pattern is for a 12 x `18 inch quilt .. would this work ??

6. no idea, good luck.

7. Originally Posted by Oklahoma Suzie
no idea, good luck.
LOL:)

8. Originally Posted by janice4
Thanks for this info my daughter wants me to make a twin size quilt and the pattern is for a 12 x 18 inch quilt .. would this work ??
The proportions are not the same between a 12x18 piece (length is 1.5 times width) and a twin size quilt (length is 1.3 times width), but if you are flexible in your size, it would work, yes. If you use a factor (what you would multiply all the measurements by after subtracting the seam allowance) of 5.5, your quilt would be 66x99 and if you use a factor of 6, it would be 72x108. Both of those would work for a twin bed. Does that make sense to you?

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