M means medium, which translates roughly to women’s size 8 to 10.

Is size 12 a medium?

What dress size is a ‘Medium’? This varies from brand to brand and by country. Some stores will consider a medium to be a size 10, while others a size 12-14. As an average, a Medium is likely to be a around a size 12.

What age is M size?

M – 8-9 years. L – 10-11 years. XL – 12-13 years.