Hi, I am very sorry, I made a mistake. I do not have the Mountain Light in size 10, I have the Mountain Trail in size 10. The Mountain Light I have is size 9. If you would like I can send you the Mountain Trail in size 10 and refund you the $10 difference between the two prices, or i can refund your full amount. I am sorry for my mistake, I got the sizes and styles confused.
「私が持っているのはマウンテントレイルのサイズ10です。」は
「私が持っているマウンテントレイルのサイズは10です。」の方がいいきがする