Roller Skates, How many sizes bigger should they be?

[TortUREoiseChamber]

I want to get DS1 some skates for christmas. He is a 3 now and im sure you have to add a size or two when you buy them.
What size should i get?

im buying skates for my SD too, she is just getting into size 2 now so the skates that im getting is the ones that you can extend from size 2 - 4 so she will have them for a while this is it

HTH?

Thanks biglips.
He doesn't want inline ones and I don't think ive seen adjustable boys ones. Found these on Ebay which look good.(pic further down!)

what size is he?

Hes size 3.

if hes a size 4 then thats your best bet

have u looked in Asda, Tescos etc first?

Right hes a size 3

No not looked in Tesco. Just easier for me to buy on-line.

So how many sizes up do i go?

thought it was ice skates that you go up a size in rather than rollers.

I think rollers you do too. Could be wrong!