Library > Add Library Preview
**Library > Add Library Preview**
Sketch have updated the thumbnail size that they display Libraries at (_see image below where smaller images get white bars above and below_) , previously it was `200 x 160` it looks like it's now a square, so `200 x 200` might make a better default? 

![image](https://user-images.githubusercontent.com/7532495/74147870-066efc00-4bfc-11ea-8c32-77843e01dad1.png)

