300×250 ad size: the medium rectangle

Also called MPU, inline rectangle · Google Ads: “Inline rectangle”

Desktop and phoneup to 4 products≤ 150 KBdesign at 600×500
0.46%click rate · 1.2× the average banner
14.5%of all banner views
#11of 15 sizes by clicks

CTR and views: a sample of our own data, September 1 to October 31, 2026. Updated monthly.

300 px250 px 300×250 banner ad example: several products with prices from a Shopify store (Ocean Blue Shirt)
Real size · click the ad to open itJump to the specification ↓
All 15 sizes, drawn to scalepick another size ↓
Strips320x48300x50320x50468x60728x90320x100
Rectangles180x150200x200250x250300x250250x300480x320
Tall320x480160x600300x600

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
14.5% in our network
Click rate
0.46% - 1.2× the average banner

How the 300×250 performs in our network

What we see on Adeagle
300×250 against the average banner
300×250 medium rectangle0.46%
Average banner0.37%
320×50 mobile leaderboard0.18%
728×90 leaderboard0.33%
Click rate = counted clicks ÷ banner impressions, September 1 to October 31, 2026; 1,710,301 impressions of Shopify product ads in all sizes. 300×250 ranks 11 of 15 sizes by click rate and carried 14.5% of the impressions.

When to use the 300×250

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

  1. Use it for four products with prices - the grid is big enough for the price to be read.
  2. For a single product, pick a photo where the product fills the frame; the name sits under it.
  3. Keep text inside the image to a minimum - the ad adds the name, price and store.
  4. Keep the file under 150 KB and export it at exactly 300×250; design at 600×500 so it stays sharp on phones.
  5. Show a price - it answers the first question before the click.

Sizes to run with the 300×250

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

320×500.18% click rate · phones and apps728×900.33% click rate · desktop300×500.35% click rate · phones and apps468×600.45% click rate · desktop

Or see all 15 standard ad sizes on one page. 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 (September 1 to October 31, 2026); Google Ads image ad specifications. The example ads use the products of Adeagle's demo store.

More banners

BannersBanner ad examples

60 real banner ads in every standard size, with what each kind gets clicked - click one to land on the product.

Free toolCTR calculator

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

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 0.46% click rate - 1.2× the average banner (0.37%) - and was 14.5% of all banner impressions.