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Creative Specifications
Digital ad sizes are equally as important as the audiences you choose to target. If your ad doesn’t fit on a specific device or webpage, it will be disregarded and perform poorly. That is why Choozle has created a downloadable guide that explains:
- The top-performing display ad sizes
- Top-performing mobile sizes
- Video sizes
- Native sizes
You’ll also learn about the display assets that include:
- Accepted sizes
- Accepted file types
- Asset requirements
- & other important information
Note: Choozle does not support Flash Creative
Deep dive into video assets, including:
- Accepted sizes: 200MB or smaller
- Accepted file types: MP4, FLV, WEBM, MOV, MPG, MPEG, OGG
- Video length: The acceptable duration for video ads ranges from 5 to 300 seconds, although the preferred lengths are 5, 15, 30, and 60 seconds. Auto-start video ads should be limited to a maximum duration of 15 seconds.
- Assets needed
- Companion creatives
Note: You can include companion display ads and enable video ads for skippable inventory within the video asset settings. In the ad group’s advanced settings, you can specify bidding on in-banner inventory once video assets have been added to the ad group.
You’ll also have access to information that covers creative specifications about third-party ad tags:
- Accepted file types
- Asset requirements
Note: Ensure your third-party assets meet our display standards in addition to the IAB standards.
Find out information about HTML5 Assets:
- Accepted sizes
- Accepted file types
- Ad length
- Asset requirements
Note: ZIP files can’t contain nested folders. Additionally, when embedding an in-banner video within an HTML5 asset, the first onload event should not exceed 50KB, while the second onload event can go up to 2MB. HTML5 assets cannot be expandable
Learn about Native Assets:
- Accepted sizes
- Accepted file types
- Asset requirements
Note: Ensure your third-party assets meet our display standards and the IAB standards. The 1.91:1 aspect ratio is the most common size for native assets, and we recommend building at least one image in the dimensions of 1200×627. Other common sizes include 1200×1200, 1000×750, 1200×800 and 1280×720.
You’ll also find information about audio assets, connected TV assets, display dimensions, video dimensions, logo dimensions, and much more.
Download now to view every type of creative specification you need to run a digital ad campaign successfully.
Tina Starr – CEO
Tina Starr is the Chief Executive Officer of Choozle, where she guides the company’s strategic direction, operational excellence, and long-term growth. With more than 15 years of experience in marketing, media, and technology, she is known for aligning teams around clear priorities, elevating performance standards, and delivering measurable outcomes for brands and agencies.
Before becoming CEO, Tina served as Executive Vice President of Revenue. She unified Sales, Account Management, and Media Solutions into a single integrated organization designed to improve performance, strengthen client relationships, and drive sustainable growth. She advanced Choozle’s market position by championing transparency, improving inventory quality, and expanding access to advanced measurement, enabling clients to connect investments to real business impact. She also built a deeper leadership bench and supported the advancement of women into senior roles.
Earlier, Tina served as Vice President of Account Management and Strategy, where she developed scalable programs, improved campaign execution, and led teams that consistently delivered stronger retention, revenue growth, and client outcomes. Before joining Choozle, she held senior roles at Next Step and HumanDesign and contributed to Google’s Premier Partner Program, shaping standards that influenced the broader performance marketing industry.
Tina is a collaborative and data-informed leader who combines strategic clarity with operational rigor. She mentors emerging leaders through Upnotch and DECA and has supported organizations such as the American Cancer Society, Habitat for Humanity, and Alpha Chi Omega. As CEO, she leads Choozle with a people-first mindset, ensuring that technology strengthens expertise and enables the company’s next era of innovation and customer-focused growth.