Size S: 0-13 pounds, Size M: 13-27 pounds, Size L: 27-38 pounds. Ample quantity: the package contains 2 pairs of thumb sucking guards in pink, 4 pieces in total, providing enough supply for frequent changes and maintaining hygiene. Breathable and soft: made of mesh fabric, these baby thumb guards offer good breathability and softness, helping prevent sweaty hands; both the fingertip and wrist areas are reinforced with fabric to enhance durability and extend use. Adjustable strap: equipped with a strap and plastic buckle, allowing adults to easily adjust the fit to suit small hands and help prevent the guard from falling off. Help discourage habits: designed to help reduce thumb and finger sucking and nail biting, which can leave fingers wet with saliva; these guards can assist in managing such behaviors. Easy to clean: can be sanitized by placing in boiling water for 30 seconds before first use; practical solution for parents seeking to discourage children from putting fingers or thumbs in their mouths; makes a thoughtful gift for families or friends with infants.