The bags have approximate dimensions of 12" x 7.5" and are certified by the U. This is a great opportunity to add a variety of uncirculated coins to your collection without worrying about their condition. Im moving, luv these coins, willing to NOT move them with me ###128542. You cant even find these and make your own. This is THE ONLY ONE LIKE IT...Melt value is 1600.00 (25% nickle, 75% copper).