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Old 11-03-2014, 06:36 AM
  #4  
Tartan
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Join Date: Mar 2011
Location: Ontario, Canada
Posts: 41,610
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I think it would be on the index finger of your hand. You put the edges of your fabric at the seam allowance you want and it would help you have a consistent seam allowance as you sew. It would be as handy as a pocket on the back of your shirt.
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