For each shirt sleeve ruffle, cut an 11-by-20-inch rectangle from shirting-weight cotton; pin eyelet trim to one long side, as shown. Fold in the other long side 1/2 inch, then again; pin and stitch, making a 1/2-inch channel. Sew eyelet in place; turn it to the other side of white fabric, and stitch 1/2 inch down from seam, making a second channel. Sew sides of "sleeve," leaving channels open. Use a safety pin to thread elastic through each channel. Cinch elastic and stitch ends to secure. Pull these sleeves over shirt sleeves.