How to make my pictures smaller on iphone 5s?

I want to make my pictures small on my iphone so that when I put them on instagram they're smaller and don't fit the whole square. Don't ask why I just think it looks more artsy ok.

Depending on how you are getting them to instagram - first you take them square (a choice on the camera) and then either you edit them (Photo Roll, Select the image, Edit in upper right, sizing across bottom) or e-mail them and just before they are sent it asks if you want small, medium or large.

There's an app for that. It's called InstaSize. It fits the whole picture into the Instagram crop.

Use whitagram or instasize x