Helmets, Summer, Aviators Various Sizes With Chinstrap Available Sizes: 7-1/8, 7-1/4, 7-3/8, 7-1/2. This purchase includes a fabric helmet with chinstrap and metal buckles intact. Below are ways to find proper sizing for personal use. How to Find Hat Size: https://www.youtube.com/watch?v=pWv7VsIhKq8&ab_channel=GoorinBros. These are in as-issued, unused condition. That said, they are 70-80 years old and the product may vary from what is shown. Some helmets will be discolored, creased, uncut threads etc. These hats will be sold as 'pick of the litter' meaning I will find the hat in best condition for you. The lower the stock the lower quality such as an unperfect chin strap. Returns are only accepted if product is severely damaged. These will be shipped in a box and protected. Thank you for your visit!