I don't know what the difference in size is, but I know my friend's wife brought over king size sheets from the UK for their new US king size bed and they were way too small. She has them on their US queen size guest bed now and they don't fit exactly but they work OK. So based on that, I guess US (which is the same as Canadian) king is larger than the UK king. There is also a "California king" which I think is a bit longer than the standard king.

Curiosity got the better of me, so here is the answer to my own question. UK Kingsize is 60''x 78'' and "super king" is 72" x 78",

US Sizes are Queen (60 x 80), King (76x 80) and "California King" a whopping NBA approved 72x 84

Iaink just pipped me to the post as I was going to say that we brought over a UK King size bed and mattress (didn't know we weren't supposed to) but in Canada it appears to be classed as a Queen size, the Canadian King Size is a bit larger.

I have to say I tend to buy my bedding on visits back to the UK - it seems to be quite expensive here - especially duvet covers. I go to Asda or Primark and can pick up a duvet cover for 10GBP, a pair of pillowcases for 3GBP etc. I don't think duvets have caught on to a great extent yet - I know they sell comforters (duvets and covers all in one for those in the UK) but I found after one wash all the stuffing moved around in it - now I buy comforters and put duvet covers over them.

Definitely check the size of your bed against the beds in the Canadian catalogues.

Our UK king is now a Canadian Queen, but the mattress is actually is a tad longer and narrower.

I was told there are two versions of King size, eastern size and western size... but I don't know how true it is. As far as I can tell Canadian King size is the size of a small room!!

Clare