Hello ? Can you recommend diapers-trunks and also so that the elastic…

Hello ? Can you recommend diapers-trunks and also so that the elastic doesn't press? I already have a headache from one word "diaper"? We weigh almost 7kg, we took Momi size M, the elastic is very tight, we took size L bigger, it leaks, and the elastic leaves traces on the belly?‍?? Do all trunks like this or not? So tell me what brand you use