These A1 rounded top flat cards measure 3.5" x 4.875" and are crafted from 100% recycled card stock. They're perfect for hand-lettering, stamping, paper crafting, screen printing, and more. Each set includes 25 flat cards (270 GSM) and 25 envelopes (105 GSM). The high-quality stock gives them a premium appearance, and the sturdy envelopes ensure your messages are delivered securely and in great shape.