I layed the fabrics fleece first, then lining cotton (right side up) then outer cotton (right side down) and stitched them together with a generous 1/4" seam, leaving an opening for turning along one side
I marked the fabric (using a frixon pen) into 9 squares, all 5x5 inches
And then stitched over the lines, and continued round to top stitch the edges, including the opening so that was now stitched closed
I then folded the unit diagonally and stitched along the matched seams as shown . . .
. . . to make a triangular pocket
I folded the point down, and secured with a button (what do you mean it looks like a pin?)
I continue with all four corners, then took an out of focus photo
Ta da - a sewing caddie with pockets for pens, threads, scissors etc