I'm trying a new method today - press fat quarters right sides together with lots of starch. Trim one long side, then cut one 6½" strip and one 7½" strip.
Sew the long seams, turn and press, cut into 5½" pieces.
Fold and press those, sew and serge the end seams. Turn and press again.
Sixteen pouches from 4 FQ's, plus plenty of scraps leftover to make into outside pockets in which you could store lens wipes or moist towelettes.