How to Shorten a Dress Without Sewing Quick Guide Easy way to hem a prom dress. Its easier than cutting first. You sew first. , mark the hem. Subtract 1 2 for hem. , mark with chalk marker and turn to the inside on chalk marks. I hemmed 2 DIY ways to shorten a dress without sewing Todays objective: Picking Lace , In order to hem this gown without cutting the lace in half, we pick the lace entirely off, recenter, and sew it back on!, Need your prom or wedding dress altered? Lilac Asymmetrical Ruffle Hem Spaghetti Straps Prom Dress Blue Cut Out Tie Back Layered Hem,Short Prom Dress,Boho Dress Y4696 Simplepromdress