A Teenage Boy shrinks on Spring break in Mexico, now stuck with Lusty Giantess Latinas...

You are a human who arrives in Equestria by mysterious means

You're a dimensional traveler, able to open portals to other universes and dimensions.

Take up the Identity of a victim of the shrinking virus, an epidemic to the world

More Size Changing GTS Fun! This is primarily a shrinking/giantess story. Shrinking device plays major role. See what happens. New characters are welcome.

Various stories taking place in the Lilliput, Gulliver and Brobdingnag universe.

Tails create a mini ship to study his friend from the inside (PLZ ADD)

A human mage decided to go inside of our favorites ponies!

A mysterious resort on a pacific island, full of transformation.

A branching interactive story with the gals and pals of RWBY focused on size themes. Get shrunken down and explore the world of Remnant (and its inhabitants) at a much smaller scale!

A small boy, one of many, trying to live as best he can under the giantesses of the world. (copied from writing.com)

For the longest time, you've been teased by your classmate Bea. She somehow found out about your fetishes and uses that information to torment you. You can't explain it, but somehow you begin enjoying being tormented. One day, after purchasing shrinking pills off a shady website, you decide to live out your fantasies.

A story in the Harry Potter world involving insertion and unaware giantesses.

Sammy, born into a world of tiny men and giant women, is a hopeless pervert.

You wake up in the world of Equestria Girls as a tiny person.

A fantasy world, where anything goes.

Kelly’s trying her luck on the tiny side of Tinder. None of her dates are going very well.

A "Giantess/Endo" story centered around the Princess of Friendship (PLEASE ADD)

Julie has a big appetite. What happens when her body grows to match her hunger?

When a man disturbs a Futanari's fun, you know she'll make him pay.