I gave the pegasi little deer-tails to give them something special, like how the unicorns have long tails and the Earth ponies have the special hooves.

More Information:

Limestone - being from a family of rock farmers, she is far larger than most ponies (mares and stallions). Her hooves are thicker and messier due to her job, and she has many muscles.

Saffron - Neighsian ponies are taller (mostly due to having longer, pointer horns and ears). She is slightly taller than the average Neighsian unicorn mare.

Fleetfoot - her hooves have toughed up from Wonderbolt training, and she has become more sleek and aerodynamic from the training as well. Most of the Wonderbolts are smaller (meaning that they encounter less air resistance for the price of needing stronger flight muscles), so her uniform had to be resized from a stallion uniform.

Lotus - nothing about Lotus's body shape is unusual, expect for her hooves. Since she works at a spa and gives massages, her hooves are much smoother and softer than most.

Amethyst and Flitter - they are the average size of their races. 

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Noice =3