The late 1820s marked the beginning of broad sleeves (gigot or leg-of-mutton, as they were known) and fuller skirts, which reached an incredible breadth by 1833. You’ll also notice the hats become wider to suit the proportions of the dress.
The lady on the right wears a pelisse of sage green and a pelerine (cape) of the same color. A fashionable walking dress had to be worn with a collerette, hers has scalloped lacy edges which tie in the scallopped trim. Turn-back cuffs in the Vandyke style add the finishing touch.