Most shaped nappy systems have just two sizes to fit babies from 7 – 35lbs which will be sufficient for an average size baby from birth through to potty training.
Dim ond 2 faint sydd i'r mwyafrif o systemau cewynnau wedi’u siapio, i ffitio babanod o 7 – 35 pwys, fydd yn ddigon i fabi maint canolig o’i eni hyd at hyfforddiant poti.