ok you need to get some Baby Beehind Covers .. they are awesome and super strecty and leak proof, i use them over any fitted nappy and never had an issue .. and only $11.50 each they are a bargain , have a look at their website and see their covers ..

how much does Jaz weigh , Gab is 4.8 and they still are a little big on her (small size) but the good thing about bbh covers are that the sizing is generoous and long lasting , the soft fold over elastic sits against the babies skin and is comfy , meaning no cutting in or no red marks !!

they are sandwich PUL which means they are soft and flexible ...