Size: Cards measure a generous 4“ x 6” when folded. Envelope size is 4.2" x 6.2". Blank on the inside: Blank Inside. Each pack Includes 50 thank you cards and 50 envelopes. Matching envelopes included: Each envelope's interior is lined with the green leaves pattern to perfectly match each card. Cardstock: All cards are made of heavy-duty paper at a grade of 300 grams per square meter. All envelopes are with a water-activated adhesive seal. Safari thank you cads: Safari thank you cards are suitable for your baby shower, baby sprinkle or birthday party.