as sizing for toddler wear can be inconsistent, mer-made choses to provide measurements of the garment, rather than of the child. all measurements are in centimetres (cm)

the two waist and chest measurements are of the garment's width as is and then of its near maximum stretch. they are taken when the garment is laid flat i.e. it's width

to get total chest or waist measurements( as of the child) the figure must be doubled . for example waist 18-22 means the garment has a width of 18cm, stretches to a width of 22cm, hence would fit a child whose waist is about 36-44 cm

the two measurements provided for pants are that of the waist to the crotch and of waist to hem

womens wear

sizing for womenswear is the same, except if otherwise specified, for example, wraps have the total garment width provided