Flexible Baby Trial Frames Sku(s): 472300 (Baby Size 50 PD), 472400 (Toddler Size 58 PD) Description: Please specify which color you want when ordering. These simple trial frames are made of flexible plastic and hold two 38mm trial lenses on each side. It comes with a soft elastic strap to provide a comfortable snug fit. Fully marked. The Baby Size measures 98 mm from hinge to hinge. The Toddler Size is 108mm.