How to sew a gusset (for sleeves)
Added Nov 22, 2010
With right sides together, begin to pin one side of the longer gusset extension to one side of the open armpit at the sleeve end.
The trickiest part is getting the starting point right - you are aiming to match the point that is 1.5cm from the armpit corner of the gusset, with the point that is 1.5cm from the armpit corner of the jacket. (1.5cm is roughly my seam allowance).
Pin from the corner to the end of the gusset, i.e. where the hole closes again.