I'm not sure if our babies are just shaped really differently, but Hazel is not yet 9 pounds and can wear both FB size small and Wonderoos. What are you stuffing them with? The MOE inserts or hemp inserts are really trim, whereas PF's will be bulkier. You might try the fitteds you have with the bummis covers, or other covers that are trimmer than fleece. It seems that many CD'ing families just buy clothes a size larger to cover the baby's diaper, but you can also search the diapering forum for suggestions for the trimmest diapers. I find the FB's really trim. Also, if you're new to CD'ing (like me) everything seems super huge and bulky at first, because you're used to the look of disposables. You get used to it.