You have an option to order a custom hand made envelope which fits your card perfectly. Envelopes are available for flat cards only (i.e. no extra thick paper flowers added to the card), please see Additional information on particular card product page for which you need the envelope.
Please note: this is an add-on product to existing card(s) you want to order. If you have more cards for which you need this custom envelopes you need to change quantity of custom envelopes accordingly.