Anyone else struggling with finding clothes for their chunky baby?

My kid is 9 months and he's been at least one size up in clothes since about 2 months. It's been OK until we started getting into 12-18/ 18 month clothes. He's too chunky for 9-12, but 12-18 are too long on him lol. They need like a 9-12 wide for those if us who have Michelin men for babies 🤣