Sure! You can order blank (not printed) envelopes in conjunction with other products. Gelato offers envelopes in different sizes, to go together with the most common card formats.
If you want to add envelopes to your order, you simply need to identify the correct product UID for the envelope you want to order in the Product Catalogue and add it as an option when you place your order.
Important: Please note that blank envelopes come in batches of 10.