I wanna send some TTM autographs from Canada to the US (with an envelope enclosed to return them to Canada). So I'd need US postage for this....first question is how much would I need? 2 regular stamps in a small sized envelope?

And 2nd would these work? Canada Post has free shipping on stamps for the holidays and this one is a booklet of 10 US stamps for $10.50 which is not bad if you just need to attach one of them to the envelope: