The best size for uploading images

If your image is smaller than minimum size, it will appear blurry in the link preview.

Avatar size should be 240 x 240 pixels (px).
(The minimum size is 110 x 110 px)

Button Thumbnail size should be 100 x 100 pixels (px).
(The minimum size is 45 x 45 px)

Button Thumbnail size should be 80 x 80 pixels (px).
(The minimum size is 30 x 30 px)