Gear Question Billabong R U Serious Board Short - Boys' No product reviews. Be the first to testify. $0.00 Item # BIL3691 Size? Quantity add to cart View details Tech Specs Material: 100% polyester Fit: loose Waist: surf-style tie Pockets: 1 back Recommended Use: surf and street Manufacturer Warranty: 1 year which size i need if my boy is 11 years... kristina Member since Jun 13, 2011 Posted on June 13, 2011 which size i need if my boy is 11 years old in israel he is size 14-16? (0) Gnarboardian Member since Feb 10, 2010 Responded on June 13, 2011 If he's wearing a 14 - 16....that would be sz 28 waist (0) View More Details on Billabong R U Serious Board Short - Boys'