300×50 ad size: the mobile banner

Also called small mobile banner · Google Ads: “Mobile banner”

Phones and appsup to 6 products≤ 150 KBdesign at 600×100
0.35%click rate · about the average banner
8.7%of all banner views
#13of 15 sizes by clicks

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

300 px50 px 300×50 banner ad example: several products with prices from a Shopify store (Yellow Wool Jumper)
Real size · click the ad to open itJump to the specification ↓
All 15 sizes, drawn to scalepick another size ↓
Strips320x48300x50320x50468x60728x90320x100
Rectangles180x150200x200250x250300x250250x300480x320
Tall320x480160x600300x600

300×50 at a glance

Size
300 × 50 pixels, landscape
Names
Mobile banner, small mobile banner
Google Ads name
Mobile banner
Screens
Phones and apps
File size
up to 150 KB (JPG, PNG, GIF)
In an Adeagle ad
6 products in a grid, or one product with its name
Share of impressions
8.7% in our network
Click rate
0.35% - about the average banner

How the 300×50 performs in our network

What we see on Adeagle
300×50 against the average banner
300×50 mobile banner0.35%
Average banner0.37%
320×50 mobile leaderboard0.18%
300×250 medium rectangle0.46%
Click rate = counted clicks ÷ banner impressions, September 1 to October 31, 2026; 1,710,301 impressions of Shopify product ads in all sizes. 300×50 ranks 13 of 15 sizes by click rate and carried 8.7% of the impressions.

When to use the 300×50

✓ Good forCheap reach on phones, often in apps where other ad formats do not show.
! Watch outTiny tiles - 42×29 pixels each - and taps by accident are common at this size.

Design tips for 300×50 ads

  1. Six tiles: use photos of the product alone, not lifestyle shots.
  2. Prices may be the only readable text; keep them short.
  3. Keep the file under 150 KB and export it at exactly 300×50; design at 600×100 so it stays sharp on phones.
  4. Show a price - it answers the first question before the click.

Sizes to run with the 300×50

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

320×500.18% click rate · phones and apps300×2500.46% click rate · desktop and phone480×3201.01% click rate · phones and apps200×2000.80% click rate · desktop and phone

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 300×50 ad size

A 300×50 ad is called the mobile banner (also small mobile banner). Google Ads lists it as "Mobile banner".

Across the top or bottom of phone screens, mostly inside apps and on mobile pages.

150 KB per image in Google Ads, as a JPG, PNG or GIF; most other networks use the same limit. Design at 2× (600×100) for sharp phone screens and export at 300×50.

Adeagle shows 6 products in a grid, or one product with its name in this size, each with its price if you choose.

Cheap reach on phones, often in apps where other ad formats do not show. In our network it got a 0.35% click rate - about the average banner (0.37%) - and was 8.7% of all banner impressions.