Banner Ad Sizes: How to Choose the Right Size

In fact, banner ads are so common that the average person sees over 1,700 banner ads per month. Below, we break down the standard sizes for banner ads, and what to consider when selecting your banner ad sizes. Standard banner sizes are the following:Leaderboard (728x90 ad size) Large rectangle (336x280 ad size) Medium rectangle (300x250 ad size) Mobile banner (300x50 ad size) Wide skyscraper (160x600 ad size)Ideally, ad file sizes should be less than 150KB to run well on Google Display. Medium rectangle (300 x 250 ad size)A medium rectangle ad is the smaller version of the now delisted large rectangle ad. If so, ask yourself how much will you change the messaging in your ad, and will that require a banner ad size change also?