41 cent stamps? Definitely. Actually one 58 cent stamp will suffice for both if you're only sending an 8x10. But if you add cardboard or the person you're sending it to adds cardboard or something along with it then it'd probably be a safe bet to add more postage. I sent out around 30 SASE's last month to different celebrities requesting an autographed photo. I only put 58 cents postage on both envelopes. That covers just your envelopes getting there but like I said, if they send you back something along with the photo it'll probably be over two ounces, hence the need for more postage. You'll probably get it back postage due anyhow, though. I only included my own photo in three of the 30 I sent out. I've gotten two of those back already (Marco Andretti & Danica Patrick). One was fine but the other was stamped "postage due." Which was odd because both were just my 8x10 and nothing else. I didn't get the little envelope or whatever you're supposed to get though with the postage due one. So yeah, anyhow, it sounds like you're good to go.