This is what the inside of the finished cup looks like. You can see the opening where the prosthesis would slide in. We used our MH style cups as they have a strap tab and had the best look for this particular situation (not to mention - the best fit on this student)
Once the footprint is traced, you will need to prepare it for the opening. I decided to put the opening running from the strap straight down vertically to the bottom edge. This is my go-to choice of opening. All of the perimeter is closed so the prosthesis can't creep out, and the opening is wide enough to get the breast form in without rolling it up like a burrito.
Once the line is drawn, draw a broken line on each side of it, out from the line about 3/8"-1/2" (10 -12 mm). These lines provide the overlap we need.
These two pieces are the pieces we will cut out of the fabric. I almost forgot - the DOGS run from side to side as shown here. We need for the DOGS to stretch around the body so the cup can conform to the body shape. Also you don't want the cup stretching up and down, or the form will bounce around.
Lay the fabric for the pocket FACE DOWN and lay the pattern pieces facing up as shown. If the fabric is face up, the pocket will have the wrong side facing the wearer. What fabric do we use? Anything soft that will also stretch from side to side. My go-to fabric is a Modal knit...soooo soft, and nicer feeling on sensitive skin than cotton jersey.
Pin the pocket into the inside of the foam cup, overlapping one over the other. Once it is pinned, you can sew it all around. I always sew from the foam side, not the fabric side. The fabric side will tend to stretch as you are sewing it (a phenomenon called fabric creep). Sewing from the foam side prevents creeping.
By the way, these are my two pink shoes...one for "everyday" tape and one for "special occasion" (removable) tape!
The sewing should be sewn within 1/4" (6 mm) of the foam cup edge. This will allow the pocket stitching to be hidden under the elastics or other finishing the cup will receive. Alternately, it could be serged all around, as stitching so close to the edge is not as easy as it sounds.
You can see the fold-over binding has been sewn on the neckline edge. The cup is now well on its way to being sewn into the bra frame.
In my next post, I will show you how to make a breast prosthesis from scratch! Yes, it can be done!