My son is in a size 8, I didn’t go by weight or anything on the packaging, just by the fact they seemed small/tight on him. We use Aldi and Tesco nappies and we very very rarely have any leaks
Same here, 2 year old daughter , I buy size 7 from Aldi, she is quite tall
Every bottom is different and changes size and shape as they grow. You just need to experiment and try different ones until you get a good fit. Also, make sure if she is wearing a vest that it is big enough too, because a full nappy can get squished by a vest if it’s too small.
Do they do a 6+ size? If not I know Asda & Tesco do them x