the blank doesnt print exactly right. its too large by .25 . 3x4 is the exact size you need and you can also print out the vax info on return address stickers here is my amazon purchases https://www.amazon.com/dp/B00004Z5QO/ref=cm_sw_em_r_mt_dp_V3A3CTRYWD7DDYQS3ECS?_encoding=UTF8&psc=1 https://www.amazon.com/dp/B006P1EQXA/ref=cm_sw_em_r_mt_dp_KBXWMX9A7V8TN36AWRM1?_encoding=UTF8&psc=1 https://www.amazon.com/dp/B06XVN1HDR/ref=cm_sw_em_r_mt_dp_X3JS0XYC74662R7DZADN?_encoding=UTF8&psc=1 https://s.yimg.com/ny/api/res/1.2/ztJnUK_uG_fCLM5p.VfczA--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTYzOS44NTczMzM5Mjc3NzU0/https://s.yimg.com/uu/api/res/1.2/H8_KpT_X392ITAQhFOu6Cw--~B/aD0yOTkwO3c9NDQ4NjthcHBpZD15dGFjaHlvbg--/https://media.zenfs.com/en/ap.org/a31e3a24c47cd1f7ea1e5551e1ee6f9b