Dog is born to swim,but they will be very serious for first time to swim,wear this floating swim wear will make them calm down better.even experienced doggy also need this if the pool is deep and you don`t know well about pool size,espeically swim at seaside.it is very important to wear one for old doggy,they maybe experienced swimer before,but after getting older and older,their strength can`t follow up the spide of water velocity.
Size details:
Size: XXS--Back length:5.9in, Neck circumference:7.5in-22in, Bustline:11in-14.5in, Fits weight:Unders 6.6lbs, Item weight:0.22lbs.
Size: XS--Back length:8.3in, Neck circumference:9.8in-13.7in, Bustline:114.8in-16.5in, Fits weight:7lbs-15.4lbs , Item weight:0.33lbs.
Size: S--Back length:10.2in, Neck circumference:14.2in-18.5in, Bustline:16.1in-20.9in, Fits weight:15.5lbs-19.8lbs, Item weight:0.352lbs,
Size: M--Back length:11.8in, Neck circumference:15.7in-18.9in, Bustline:20in-24.8in, Fits weight:20lbs-50.6lbs, Item weight:0.44lbs,
Size: L--Back length: 13.8in, Neck circumference:16.5in-21.3in, Bustline:19.7in-29.5in, Fits weight:51lbs-80lbs, Item weight:0.55lbs,
Size: XL--Back length:17.7in, Neck circumference:19.7in-27.9in, Bustline:27.6in-37.4in, Fits weight:80lbs-88lbs, Item weight:0.77lbs,
Size: XXL, Back length:18.9in, Neck circumference:24.4in-35.4in, Bustline:34.6in-48.8in, Fits weight:88lbs-110lbs, Item weight:0.99lbs,
Astage Pet Supplies Doggy Lifejackets Swimming Support For Dog - B07514KMC3