"I would like a short-sleeved dress for summer."

Translation: Je voudrais une robe à manches courtes pour l'été.

[Arthur8486]

Why court after noun and not before?

[Louradour5]

Because it's a fixed expression, you could also have the opposite : à manches longues.

[InvertedGo]

What are three-quarter sleeves called in French?

[effyleven]

I thought "courtes" automatically fell into the BANGS rule under size.