The maximum supported file size for uploaded photos are 8 MB for standard (free) account and 25 MB for a pro account. We recommend you to not exceed the given size limit while uploading photos.
Supported image formats are JPG, JPEG and PNG.
In regards to dimension, in most styles offered by Picovico, 16:9 landscape ratio photos produce the best result and thus, it's your best choice while uploading images. However, you can also choose to create a square (4:3) or vertical (16:9) video.