I use this: https://www.amazon.com/Sucipi-Professional-Backpack-Ventilated-Compartment/dp/B08QZLLYFB

Holds 3 paddles in the paddle pocket very easily. Then room for shoes, clothes, towels in the main compartment. Then some balls, overgrips, etc in the other pockets. Has a fence hook too. Affordable and holds up real nice.