Please note that the size chart is for reference only and cannot guarantee a perfect fit. Please use this chart as a guide only. GDM HELMETS (Duke Series) SIZE CHART. Small 21 5/8" -- 22". Medium 22 1/2" -- 22 7/8".
Large 23 1/4" -- 23 5/8". X-Large 24" -- 24 3/8". 2X-Large 24 3/4" -- 25 1/4". The item "2021 GDM Demon Motorcycle Helmet with Intercom Bluetooth Headset + Smoked Shield" is in sale since Friday, April 9, 2021. This item is in the category "eBay Motors\Parts & Accessories\Apparel, Protective Gear & Merchandise\Helmets & Accessories\Motorcycle & Powersport Helmets".The seller is "motorcyclist_shack" and is located in Glendale, California. This item can be shipped to United States, Canada, United Kingdom, Australia, Mexico, Germany, Japan, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.