Looking for a life jacket

i am looking for a life jacket for my staffy son and because of the deepness of his chest i always get something that doesn't fit then i have to exchange it. does anyone know of a great place to purchase one?

Ooo wish I could help but Moo has never needed one!

Ezydog do one

http://www.ezydog.co.uk/dfd-dog-flotation-device/

We were in this situation last year. I cant say whether this is the supplier we used (cant remember) but this is the design that we bought:
http://www.amazon.co.uk/Wee-Pet-Dog-lifejacket-buoyancy/dp/B007R4ZIY0/ref=sr_1_15?ie=UTF8&qid=1395773748&sr=8-15&keywords=dog+buoyancy+aid

It is comfortable for him to wear (I imagine), there is a soft but robust cloth that goes under his belly, backed up with a couple of clasps, and a sturdy handle on top for catching with the end of your boat hook if you need to grab him.

I dont consider Douglas to be a large dog, but Large was the size that he needed (he's 21.6kg).

Here it is in action:








And the obligatory apres-sail shot:


Hope this helps.....

My little guy just starts to sink, I guess due to his muscle mass, (so I guess he is not that little) LOL! So, thank you everyone for your suggestions, much appreciated! : )