Many variations on this – may have one or two pockets each with one or two glue flaps. One or both may have capacity. Not all sizes or styles can be machine glued.
Excellent ‘designer pack’, but stacking strength is not good. As a general rule the smaller dimension of the opening needs to be 50% or less than that of the larger to enable ease of erection.
Popular as a mailing envelope. Also known as a ‘Board Envelope’ and is available with a tuck-in instead of glued flaps.
Popular as a mailing envelope. Also known as a ‘Board Envelope’ Available with an adhesive flap, with a peel off strip, instead of the tuck shown.