Whenever I make image on photoshop they're always smaller than they should be. I create new documents with the appropriate pixel size (width 540) but in the document it always looks smaller than what I know goes on tumblr. Then, when I upload it to tumblr it's enlarged and blurry. What am I doing wrong?
If the problem is with photoshop, always try to save images in format png. Is the format that the tumblr holder accepts the original image quality. If it is a problem with the dimensions of tumblr see the information below, for more details with photo view click on the source, all the information below is from the source @unwrapping
Tumblr Dashboard Image Sizes: [post]
Photo post: 500 by 750 pixels for dashboard view; 1280 by 1920 pixels for high-res version (except for superwide panoramas).
Photoset: 500-pixel width for one image in a photoset row. 245-pixel width for two images in a photoset row. 160-pixel width for three images in a photoset row. Gutters are 10 pixels.
Audio Post: 169 by 169 pixels for album art.
Link Post: 130 by 130 pixels for the thumbnail image grabbed by Tumblr from web link (if available).
Text Post: 125-pixel width for images added to a text post, which expand when clicked.
Avatar: 64-by-64-pixel icon next to posts.
Tumblr Dashboard Image Display Sizes (Updated March 20, 2016): [post]
Photo Post: 540 by 810 pixels for dashboard view. Use 1280 by 1920 pixels for high-res version (except for superwide panoramas).
“Tall” Photo Post: Tumblr takes a 300-by-810-pixel version of your image then stretches it by 80% using HTML height and width attributes to make it 540 by 1458 pixels. Image quality may be diminished. Aim for uploading at least 710-by-1920-pixel images in case Tumblr switches to a better image size on the Dashboard. (It’s happened before.)
Photoset: 540-pixel width for one image in a photoset row. 268-pixel width for two images in a photoset row. For three images in a photoset row, Tumblr displays 177 pixels on the left and right images and 178 pixels for the middle. Gutters are 4 pixels.
Audio Post: 169 by 169 pixels for album art.
Link Post: 540 pixels wide for the image grabbed by Tumblr from the web link (if available).
Text Post: As of March 30, 2015, inline images can appear full-width(540 pixels wide). Any inline images that are 300 pixels wide or larger will display as full-width.
Avatar: 64-by-64-pixel icon next to posts.
