Today a friend of mine, visiting Europe with her 10 year old daughter, sent me an e-mail about a brand of disposable baby diapers sold there. These are called Bambolina, apparently a product of Abena.
The size Maxi is labeled for 18kg, which is about 40 pounds. This is similar to the Pampers Cruisers Size 7 sold in the USA. However, Bambolina also come in "Junior" for 25kg (55 pounds) and "XL" for 30kg (65+ pounds).
This friend's daughter often wets her bed. GoodNites and Under Jams have not worked well on her in bed. I believe the girl, who is slender, weighs less than 65 pounds and is perhaps as tall as 4'10" My friend told me she was buying the larger two sizes of the Bambolina and will report if they fit and if so if they reduced the leaking.
What is unclear is if the Bambolina, which are cloth-like with resealable sticky tapes, are intended for older kids to change them without help. That is the best part of GoodNites and Pull-ups for smaller kids.