What stamp do I put on a Canada SASE?

[youseekyoda421]

I'm hoping to write to a couple of guys through the Toronto Blue Jays. If I'm sending from the US, what kind of postage do I put on my SASE? Thank you in advance for any help.

 

[youseekyoda421]

I think that back in the day I put American postage on and it made it back just fine. Can anyone confirm?