Poker Size Bicycle playing cards are the worldwide standard for magicians. Produced by US Playing Card Company with the famous "rider back":

These poker size cards offer the best quality finish for durability and are available in red or blue. We got tons of magic effects that match this back design.

You can choose between red back, blue back or if you want a mixture (only relevant if you want more than one deck) you can order mix. If you buy a full case of 12 pcs. you get 10% discount.