Alfie Couture Designer Pet Apparel - Doggie Hero Spiderman Costume Please note that this listing is for size Small. Best fit Neck Girth: 9.5", Breast Girth: 15", and Body Length: 8.5". We recommend one size up for comfort if your dog's measurement is the higher end of the range listed. Please note that these lengths represent the size of the dog and do not reflect the actual length of the garment. Sizing for each dog is unique. Similar to our clothing and accessory, medium size from one designer is not the same for another. For example our 9-pound yorkie model usually fits either one of three sizes (i.e. XS, S, M) depending on the designer. We highly recommend you measure your pet precisely with a flexible tape measure to ensure the best fit. Contact us if you have question. We are happy to help. This costume is the perfect gift for your little one! Great for special occasion and weekend party. You will not be disappointed with the details. Easy to put on and comfortable to your little baby. Alfie is a registered trademark and is exclusively distributed by Petoga Couture. Alfie trademark is protected by US Trademark Law. Use is strictly prohibited. Other seller offerings are counterfeits, they will not be identical to what is advertised here. Petoga Couture ship from US thru Amazon therefore all orders with them are eligible for FREE Super Saver Shipping and Prime Shipping Upgrade.