Our Pastel Custom Colors II Postcards are a great way to get your message noticed. Customize these postcards online free with your logo, photo and custom text. Pastel color postcards are available in 2 sizes: Standard Postcards measure 4-¼" x 5-½" and Jumbo Postcards measure 5-½" x 8-½". Available in 3 stock choices: Heavy (111lb), Premium (130lb) and 80lb.