300×250 ad size: the medium rectangle.

Inside articles, at the end of posts, in sidebars and between items in app feeds. Almost every site and app has a slot for it. Below: four real Adeagle ads in 300×250 - click one to land on the product, the way a shopper would.

Free · real ads · our own data · reviewed October 2026

300×250 banner ad example: several products with prices from a Shopify store (Ocean Blue Shirt)
Several products with prices300×250 · opens the product in our demo store
300×250 banner ad example: several products from a Shopify store (Ocean Blue Shirt)
Several products300×250 · opens the product in our demo store
300×250 banner ad example: one product with its price from a Shopify store (Ocean Blue Shirt)
One product with its price300×250 · opens the product in our demo store
300×250 banner ad example: one product from a Shopify store (Ocean Blue Shirt)
One product300×250 · opens the product in our demo store

300×250 at a glance

Size
300 × 250 pixels, landscape
Names
Medium rectangle, MPU, inline rectangle
Google Ads name
Inline rectangle
Screens
Desktop and phone
File size
up to 150 KB (JPG, PNG, GIF)
In an Adeagle ad
4 products in a grid, or one product with its name
Share of impressions
18.7% in our network
Click rate
0.60% - about the average banner

When to use the 300×250

Good for: The safest first size: it fits desktop and phone screens, and it has room for four products with prices or one large product photo.

Watch out: Many 300×250 slots sit low on the page or between paragraphs, so a share of the views happen while people read past it.

Design tips for 300×250 ads

  • Use it for four products with prices - the grid is big enough for the price to be read.
  • For a single product, pick a photo where the product fills the frame; the name sits under it.
  • Keep text inside the image to a minimum - the ad adds the name, price and store.
  • Keep the file under 150 KB and export it at exactly 300×250; design at 600×500 so it stays sharp on phones.
  • Show a price - across all sizes, ads with prices got more clicks than the same ads without.

How the 300×250 performs in our network

What we see on Adeagle
300×250 against the average banner
300×250 medium rectangle0.60%
Average banner0.56%
320×50 mobile leaderboard0.33%
300×50 mobile banner0.51%
Click rate = counted clicks ÷ banner impressions, August 1 to September 26, 2026; 2,201,475 impressions of Shopify product ads in all sizes. 300×250 ranks 10 of 15 sizes by click rate and carried 18.7% of the impressions.

Sizes to run with the 300×250

One size never covers every slot. These fit the same screens:

Or see all 15 standard ad sizes drawn to scale. Adeagle makes every one of them from your product photos, names and prices - no design work, and a new product appears in every size the day you add it.

Sources: Adeagle network data (August 1 to September 26, 2026); Google Ads image ad specifications. The example ads use the products of Adeagle's demo store.

More Banner ad sizes and design tools

All banner sizes on one page, and what their clicks are worth.

Impressions10,000
Clicks80
click-through rate0.8%

CTR calculator

Your click-through rate, and how it compares with a typical small store.

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Winter jacket$89

Your product as an ad

Coming soon

Paste a product link and see it as ads in every size - the way Adeagle shows it.

↳ How does my product look as an ad?

Questions about the 300×250 ad size

A 300×250 ad is called the medium rectangle (also MPU, inline rectangle). Google Ads lists it as "Inline rectangle".

Inside articles, at the end of posts, in sidebars and between items in app feeds. Almost every site and app has a slot for it.

150 KB per image in Google Ads, as a JPG, PNG or GIF; most other networks use the same limit. Design at 2× (600×500) for sharp phone screens and export at 300×250.

Adeagle shows 4 products in a grid, or one product with its name in this size, each with its price if you choose.

The safest first size: it fits desktop and phone screens, and it has room for four products with prices or one large product photo. In our network it got a 0.60% click rate - about the average banner (0.56%) - and was 18.7% of all banner impressions.

Want another tool? Tell us which one: [email protected]