The construction is the point. Side seams and a full flap mean nothing works its way out of a corner, which is what happens to seeds, small parts, screws or samples in a standard envelope. They are also small enough to file in a box or a drawer. Plain stock takes writing directly, so no separate label is needed. See envelopes, desk accessories and shipping tags.

Seed envelopes arranged on a bright gardening workspace with labelled seed packets, twine, plants, watering can and garden notes.
Seed Envelopes

Shop seed envelopes for gardening, seed saving, nurseries, schools, plant projects and organised storage.