#4 Glassine Envelopes
3 1/4″ x 4 7/8″
The #4 Glassine envelopes are ideal to use when collecting, storing or shipping large-sized butterflies like Monarchs and Swallowtails. They can also be folded in half and used for two small butterflies. Our glassine envelopes are sold in units of 500. All butterflies should be placed in the envelope with their wings folded closed in resting position.