Universal Stationary

I've been on the hunt for universal (preferrably kraft) stationary for quite some time now. Today, I finally found it! The Paper Addict, a wonderful stationary supply shop on Etsy, carries a great variety of plain stationary in unique sizes and colors. The particular set I purchased measures 2.5" x 2.5". I plan on using this stationary primarily as thank-you notes for wholesale customers, as well as gift cards for the holidays. I'll post a follow-up of my DIY thank-you notes soon!