This case has been awesome for me. Holds a whopping 5 cards without feeling bulky.

iPhone X Case, [HEAVY DUTY DROP PROTECTION] Hybrid Card Slot Wallet Cover [Wireless Charging Compatible] for Apple iPhone X / iPhone 10 (2017) by Lumion (D.Folder -White) https://www.amazon.com/dp/B075QXJ46K?ref=yo_pop_ma_swf