@CSAchook
Make a base mask out of some extra fabric, just the inside layer, don't finish the edges. Have him put it on inside out so the seams face you and add fabric to where you need it to make it fit properly. Sew new pieces on, then disassemble along the base seam lines, extending them through the new additions as needed. That should give you enough information to make the pattern pieces that you need. Don't forget to add seam allowances to the new pieces. If there are darts, you'll have to add paper and sketch the shape of the dart to create the new line in the pattern.
If you don't understand any of this cuz you don't do a ton of piecing patterns together or altering, feel free to
I've done costumes for my kids that include creating stuff by using pieces from different patterns to make the garment, adding fabric and adjusting seam lines to make sure work. The process can be
, but the results are usually 
, at least according to the kids.
Make a base mask out of some extra fabric, just the inside layer, don't finish the edges. Have him put it on inside out so the seams face you and add fabric to where you need it to make it fit properly. Sew new pieces on, then disassemble along the base seam lines, extending them through the new additions as needed. That should give you enough information to make the pattern pieces that you need. Don't forget to add seam allowances to the new pieces. If there are darts, you'll have to add paper and sketch the shape of the dart to create the new line in the pattern.
If you don't understand any of this cuz you don't do a ton of piecing patterns together or altering, feel free to
I've done costumes for my kids that include creating stuff by using pieces from different patterns to make the garment, adding fabric and adjusting seam lines to make sure work. The process can be
, but the results are usually , at least according to the kids.
