# need help enlarging a pattern

• 12-27-2009, 03:20 AM
lisalovesquilting
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
• 12-27-2009, 04:37 AM
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.
• 12-27-2009, 05:14 AM
lisalovesquilting
Quote:

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
• 12-29-2009, 06:41 AM
butterflywing
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.
• 01-10-2010, 02:02 PM
janice4
Quote:

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 ??
• 01-12-2010, 05:53 PM
Oklahoma Suzie
no idea, good luck.
• 01-12-2010, 07:05 PM
janice4
Quote:

Originally Posted by Oklahoma Suzie
no idea, good luck.

LOL:)
• 01-12-2010, 08:12 PM
ghostrider
Quote:

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?