A large pouch fit to the Nintendo Switch Lite and 3DS XL with a Kirby theme. I have a 3DS and a Switch but not those versions so the fitting was a little tricky. Commonly provided dimensions don't always include the joysticks. Fortunately I happened to have a perfectly pink lambskin in stock that made the perfect lining. And a running half stitch was both structurally sound and matched the aesthetic Nintendo uses for a lot of it's products.
This is such a good idea I'm going develop my own next year and if that works well it might wind up on the shop.