Meaning

1 senses
  1. (Canada, US)A type of cloth diaper which can be adjusted and lengthened to match the baby's growth, thus allowing the diaper to be worn from around birth (by a newborn) to potty-training age.

Origin

From the notion that the diaper is intended to fit the baby from, or near, birth until the

From the notion that the diaper is intended to fit the baby from, or near, birth until they are toilet-trained, thus coming in only one size; compare one-size-fits-all.

Wiktionary, CC BY-SA 4.0 · source

one-size diaper — meaning, examples, forms, synonyms | Krumeto