... C5/C6 etc. Competitive SpecificationNo. 10, - 4-1/8in x 9 1/2 in , v-flap, plain, 50 counts per boxNo. ... - 4-1/8in x 9 1/2 in , v-flap, security, 40counts per box No. 10, - 4-1/8in x 9 1/2 in , peel ... & seal, plain, 55counts per boxNo. 10, - 4-1/8in x 9 1/2 ... & seal, plain, 65 counts/boxNo. 6, 3-5/8in x 6-1/2 in , peel & seal, security, 55 counts/boxPaper: 20lb, ...