what pixels should your photo be
For Facebook Ads, you should use images that are at least 1,200 pixels wide; images for News Feed ads should be at least 600 pixels wide. Larger or smaller images will be resized. Always try to upload an image of the proper dimensions to avoid warping or cropping you didnât anticipate.
Photo Albums can contain up to 1,000 photos. The maximum image size for uploading to your company albums or timeline is 2048 x 2048 pixels. The maximum display size within a photo album is 960 x 720 pixels (landscape orientation). However, Facebook now allows users to choose to view images full-screen, if they choose.