Well, I have a little stash of off-the-shelf shoulder pads for sewing, but I am being anally retentive about authenticity here and really knit the pads for the Briar Rose. And this is how:
Step 1
I knit a square (about 5″ x 5″) in garter stitch
Step 2
I cut three triangles of decreasing size from padding material
Step 3
I made a “sandwich”
Step 4
I folded over the square diagonally. Step 5 (no pic): I closed the seams with a row of double crochets (the British ones š ).