18-24 month vs 2T?

vagirl06

At both Target and Gap, the sizing charts have the exact same measurements (height and weight) for 18-24 month and 2T.  So why 2 different sizes, anyone know?

Max'smom

Different styles or lines with in a brand. 24mo and 2T most of the time are the same size. But some brands like Gap have a baby line that goes to 24mo and then a toddler line.

CarissaA

I have 3 nieces who are all wearing those sizes.  It is confusing.  I asked a sales person at Macys and they said that the T s are longer than the 24 months. 

TheMalleys

I think the 2T have longer arms and waist then 18-14 mo.

tiffanysbride

For next year I bought 2T b/c DS is on the taller side. I think the main difference is height. I figure an extra inch is better then not esp since things tend to shrink a tad (esp carters sleepers).