Should work if you are a 10 in Alden Barrie. 9.5 UK is my size in Tricker's 4497 last and I'm a 10 D in Alden Barrie last (which is what the indy boots are on).
And I'm not just saying this because that pair has been tempting me for a month, but I know I wouldn't really wear it enough to justify the purchase!
Actually, Indy boots are on TruBalance, which is wider than the Barrie by a little bit (but enough to be noticeable for me). Length on the two is basically the same.