The price is based on the large size. Our Bag is a multi-purpose medicine bag which can serve as a diabetes care bag for daily use or reliable as a Car Home Office Hiking Travel Emergency Bag first aid kit bag for camping or hiking. Not only that, but it it is also perfect for cosmetic and travel supplies. ID card & bank card, can be put in inner side multifunctional bag. Large: 9.8 x 7.8 x 5.3 in ; Small:4.3 x 5.5 x 0.8 in. Large capacity make it easy to match a variety of daily travel toiletries & medicine.