• This size is generally for children 3 years to 4 years old. 
• Children who are taller than average but have small bone structure
• Children over 4 years of age who are small for their age.

Medium

• This size is generally for children 5 years to 6 years old.
• Children under 5 years old whose physical development is above average
• Children over 6 years old who are small for their age
• Children over 6 years who are tall for their age but have small bone structure

Large

• This size is generally for children 7 years and older (even some smaller adults*).
• Children whose physical development is above the average for younger children.

If you find that your child is between two sizes, we recommend you select the larger size, to guarantee better air flow inside the tube to prevent a seal that could be caused by suction and it will allow improved ventilation inside the tube which will reduce condensation and moisture that could cause skin irritation.

It's time to help your child give up the thumb sucking habit with Thumbs Out!

*Yes, adults. Don't be embarrassed, it's more common than you think. If you have had this issue for longer than you can remember and want to do something about it order a large Thumbs Out today. If you would like us to send your product a little more discretely than normal please let us know in the comments box during the checkout process. We can send it to you in a plain envelope. No one needs to know.