Compare the four
placement sizes.
Three square placements share one creative. A wide banner gets its own 8:1 artwork, so every part of your message fits.
Small
180 × 180 CSS pixels · 1:1
Default floor $2 CPMMedium
260 × 260 CSS pixels · 1:1
Default floor $4 CPMLarge
340 × 340 CSS pixels · 1:1
Default floor $6 CPM
Banner
640 × 80 CSS pixels · 8:1
Default floor $3 CPMImages scale down on smaller screens. Website dimensions use CSS pixels; physical resolution depends on display scaling. Floors are starting settings, not live quotes.
Artwork requirements
Your square artwork scales proportionally. Upload a separate banner; SideSpot never silently crops a square into it.
Static
PNG, JPEG, or WebP artwork up to 20 MB. Optional logos up to 10 MB.
Motion
Animation or silent video up to 30 seconds and 100 MB. Provide an approved static fallback for Reduce Motion.
Template
A company name, short line, optional logo, colors, and an approved HTTPS destination. Review the exact layout before submitting.
Check your artwork at each size
Check square and banner artwork in the editor before planning your first campaign.