Luv, I sent my 4 sets out in the mail today. I included a stamp that was for $4.90....asked at the window because I thought that the flat rate was $4.95, and it was, so I included another 44 cent stamp..it was all I had. I really have no idea why I had a $4.90 stamp. Was flat rate that price and then went up a nickle? Strange. Anyway, hope I got everything right! Cant wait for my package to come in the mail!