Made in CANADA. Uses Canadian Sizes, NOT UK HAT SIZES. See the sizing info tab for details.The T5MO Tilley Hat, designed with a medium brim, is made of a soft, sueded certified organic cotton with 3/4" polyester mesh. The mesh helps to both ventilate warm air out and allow cooler air to flow in while the sturdy cotton fabric is rugged yet exceptionally lightweight.Details:Guaranteed for life not to wear outInsured against lossExcellent sun protection, rated UPF 50+Dark underbrim for glare protectionRepels rain, floatsTies on in the windMachine washable, won't shrink4-page Owner's ManualSecret pocketMedium brim with 3/4" ventilation meshBrim size: Front: 2 5/8" Back: 2 3/4" Sides: 2 1/8"Weighs 3.5 ounces98% Organic cotton, 2% spandex4" high crown Tilley Hat Size Guide: 6 7/8 - 55cm, 7 - 56cm, 7 1/8 - 57cm, 7 1/4 - 58cm, 7 3/8 - 59cm, 7 1/2 - 60cm, 7 5/8 - 61cm, 7 3/4 - 61.5cm, 7 7/8 - 62.5cm, 8 - 63.5cm, 8+ - 66.5cmTilley Sizing Info: Tilley uses Canadian sizing, which is one size larger than UK sizing. If you are a UK size 7, then you would wear a Canadian size 7 1/8. Tilley suggests ordering a size above your usually hat size. If you are a UK size 7, Tilley recommends ordering a Canadian size 7 1/4. This is both for comfort and in case the hat shrinks.If you have any questions, please call us at 0844 357 7614. We are happy to help.