These are the specs for a 300 x 250 Google Ads campaign. (This size is also referred to as MREC, for "medium rectangle.")
1. PREPARE
Be sure your ad is 72dpi in resolution.
2. EXPORT
If your ad has a white or transparent background, a 1-pixel-wide color border is required.
We accept both ad tags and links.
If you are submitting a link, we highly recommend using a tracking url.
3. UPLOAD
Go to your Orders.
Select the order that your ad pertains to.
Select Upload Your Final Design or Select a Previous Design.
Follow the instructions to select the file from your desktop and upload your ad.
Add the url that you'd like your audience to click.
Submit and you're all set!
FILE DIMENSIONS: 300 pixels wide x 250 pixels high
RESOLUTION: 72dpi
MAXIMUM FILE SIZE: 150 kb
FILE FORMAT: .jpg, .png, .gif (.gif files can only loop 3 times, and for no longer than 30 seconds in total)
MAXIMUM TIME: 30 seconds
Photoshop: Click here to download a pre-set template for Google AdWords.