Combo includes the most popular sizes chosen by our book sellers: 10 #0 (6″ x 10″) 10 #2 (8-1/2″ x 12″) 10 #4 (9-1/2″ x 14-1/2″) 10 #5 (10-1/2″ x 16″) and 5 #7 (14-1/2″ x 20″) Size may vary by 1/4″ on either side Total of 45 mailers included in this lot All are self-sealing (peel and seal) Poly bubble-lined mailing envelopes from BubbleFAST. Poly (plastic) mailers lined with 3/16″ bubble. Made in the U.S.A.   Try the combo and see which sizes work best for you. Thanks for shopping at Bubblefast Mark and Robin Le Vine