3M part number 02604-20. 4-1/2" in x 5-1/2" in . Pack of (20 pads ) 320/400 Grit, Box of 20 Free Shipping is for continental USA only. If you live in Alaska, Hawaii, or PR please contact us for a shipping quote before bidding. All items are sold as shown. Since we offer free shipping we will ship the items the cheapest most cost effective way possible.