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 sufficient 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 hands from becoming sweaty; 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. Helps discourage thumb and finger sucking: designed to help reduce habits such as thumb sucking or nail biting, promoting healthier behavior. Easy to clean: can be sanitized by placing in boiling water for 30 seconds before first use; practical solution for parents seeking to minimize hand-to-mouth contact. Ideal gift: a thoughtful and useful gift for families or friends with infants.