XXXXS XXXS XXS XS S Designer Puppy Dog Chihuahua Teacup Toy Kitten Harness Coat
Size 2 : XXS. Making sure the velcro is together and bend/move the velcro around to check it's secure tightly before dog is left to walk alone. The velcro may not work as well after 6 months of usage so you must double check always.