So here we have a mane6+spike going on a picnic. This is edited version with a bit of composition change and resizing. Original scanned pencil here.
I used my previous drawings as a base for these versions of RD, Shy, AJ and Pinkie. Rarity and Twi got a bit of redesign. With this I wanted to give each pony a bit of her own personality.
Pegasi have feathered chests and feathers showing near legs. Flutters is the tallest and leanest of the bunch. Dash is compact and aerodynamic, but still well built.
Applejack is 2nd talles, but biggest and build like a truck- what you would expect form hard physical work pony. Pinkie is average but has yummy tummy.
Unicorns have been given traditional fantasy tails and cloven hooves. Rarity ofc have them painted as a proper lady would and she shaves her unicorn goatee. Also a dump truck at the back. Twilight is drawn a bit differently due to her becoming alicorn- she is bigger, her horn is straight. Also as a base unicorn and not pegasi she does not posses feathers, but unicorn traits- cloven hooves and tail.

If you want more context head on over here to my Tubmlr post on this!