"NOTE 1. Your insistence to stop this bad habit of your child is the most important thing. We have confidents that your baby can get rid of the bad habit. 2. Put on the product to baby's hand, please double over the strap after adjusting. 3. At the first beginning, baby may not comfortable and cry when wear it, we need to accompany our little one and divert the attention away from the thumb sucking finger guard, such as playing with toys, telling stories, or drinking milk. Also, you can wear only at those difficult times like bedtime and watching T.V. Once get through such difficulty days, they will used to and wear it. 4. We advise that you wash the item before use it. Use soap and warm water to wash it when dirty. 5. We advise to put it on 24 hours a day until get rid of the thumb sucking bad habit. If your baby sucking fingers only when sleeping, just put it on sleeping time. 6. Baby are active, it is better to buy two pairs for replacement if needed. Sizing Guide S: Age: 10-12 months old, Weight: 18.7-22lb, Middle Finger Length: 1.4 Inch, Palm Size: 4.9 Inch XM: Age: 2 years old, Weight: 22-27.5lb, Middle Finger Length: 1.6 Inch, Palm Size: 5.2 Inch M: Age: 2 years old, Weight: 27.5-33lb, Middle Finger Length: 2 Inch, Palm Size: 5.5 Inch L: Age: 3 years old, Weight: 33-38.6lb, Middle Finger Length: 2.2 Inch, Palm Size: 5.9 Inch XL: Age: 4 years old, Weight: 39.7-44.1lb, Middle Finger Length: 2.4 Inch, Palm Size: 6.3 Inch XXL: Age: 5 years old, Weight: 44.1-55.1lb, Middle Finger Length: 2.6 Inch, Palm Size: 6.7 Inch XXXL: Age: 6-10 years old, Weight: 55.1lb+, Middle Finger Length: 2.8 Inch, Palm Size: 7.1 Inch Package Included 1 pair Finger Sucking Stop Want to help your child stop thumb sucking? Don't Wait, Just Scroll Up Mouse and CLICK the ""Add to Cart"" Button NOW. Get rid the bad habit of thumb sucking from now on. "