What size is 3T in French sizes?
Sizes chart in French
Size 5 in men's size is about a size 7 women's. In most cases, to convert men's to women's sizes, you subtract 2 sizes from women's sizes to get the men's size, or add 2 sizes onto the men's to get a women's size. Unfortunately, this rule varies, so for a perfect fit, TRY ON THE SHOE before you buy it.
Bra sizes have two parts, a band size and a cup size. The band size is the measurement around your rib cage, and the cup size is a letter based on the difference between the band size and the measurement around the largest part of your breasts. Band sizes 30-42 are easy to find in stores, along with cup sizes A-D, and smaller or larger sizes can be found at specialty stores.
Here's a link to a nice conversion chart. http://www.bata.com/documents/pdf/size_chart_printable.pdf It seems like the EU (French) system is the most foolproof because the sizes go up by 6.6mm each increment. (Other systems seem to be comparatively arbitrary) In other words, look at your children's shoe size on the tongue of the shoe. Hopefully it will have the EU size listed too. Refer to the chart and find your EU size on the "French" scale. From there…