What type of diaper are you using? I know the new FuzziBunz have separately adjustable waist and legs.
We use tots bots easy fit which look like this. 
The fuzzibunz is what I’m thinking of trying since they have the elastic around the legs and that has always been his problem area with the fit of cloth diapers. We tried a few different types in the beginning and the tots bots were our favorite because they were so easy to use and fit him well around his itty bitty legs. I just thought we were past that since he has chunked up so much since starting solids.
