HOW TO CHOOSE THE BEST NAIL SHAPE FOR YOU -- If your nail beds are wide, try a squoval shape. If they're narrow, try a sharp square shape to widen and strengthen. If you keep short nails, a rounded shape is your best bet for low-maintenance style. You can also look at the lunula (the half-moon shape on your nail bed) for nail-shaping guidance. If it's more curved, try oval or rounded shapes. If it's flat, you're better off shaping your nails square or squoval.