Business Envelopes #10 Envelopes (4″ x 9.25″) #10 Envelopes #9 Envelopes (3.875″ x 8.875)” #9 Envelopes #8 Envelopes (3.625″ x 8.625″) #8 Envelope #6 Envelope (3.5″ x 6″) #6 Envelopes Tax Envelopes (5.75″ x 9″) Tax Envelope Invitation Envelopes Invitation Envelopes