Snapchat Dynamic Story ads: 360x600 preview tile, 993x284 logo

A Snapchat Dynamic Story ad pulls a series of 3 to 10 product ads from your catalog and shows them as a Story from a tile in the Discover tab. The one piece you make by hand is the preview tile: a 360 x 600 px PNG of 2 MB or less, with a 993 x 284 px transparent PNG logo on top and a headline of up to 55 characters.

These specs come from Snap's Dynamic Story Ads Guide, read on 2026-10-03. It is a Marketing API guide, so every step below is an API entity, not an Ads Manager screen.

Which assets does a Dynamic Story ad need?

Snap builds the ad from a preview creative plus ten dynamic creatives, grouped by a composite creative. The preview can be static (two media you upload) or dynamic (the tile image is fetched from the product set).

How is the ad built, and where does it run?

Snap's creation order, from the top, is: the preview creative, an optional static creative, ten dynamic creatives, the composite creative, the ad squad (including product_audiences), then the ad with Story type. The guide describes four variants, mixing a static or dynamic preview with or without a static creative, and each ends in ten dynamic ads.

Availability, per the guide: Website and Deep Link campaigns support both prospecting and retargeting audiences, and App Install campaigns support prospecting only. Before you set up creative elements, Snap says to check that your product feed and product set support the interaction, using Product Search with the ELIGIBLE_AD_TYPE filter (APP_INSTALL, DEEP_LINK_ATTACHMENT or REMOTE_WEBPAGE).

How do I make the 360x600 tile with Sume?

The tile is 3:5, which is not one of the ratios in Sume's Image API list (that list includes 9:16, 2:3 and 3:4). The least lossy route is to generate at 9:16, then crop. At 360 px wide, a 9:16 image is 640 px tall, so you trim 40 px, about 6 percent, from the height. Read supported_parameters first, because a model only accepts the ratios it advertises.

Leave room in the composition: Snap overlays the logo on the tile, so keep a clear area for it and check the placement in a preview. Make the logo itself from your brand files, not from a model, because a generated logo will not match your trademark. The script below resizes and center-crops a 9:16 render to the exact tile size and checks the 2 MB limit.

import os
from PIL import Image
im = Image.open("tile_9x16.png").convert("RGB")  # a 9:16 render from Sume
w, h = im.size
im = im.resize((360, round(h * 360 / w)))        # 9:16 becomes 360 x 640
top = (im.height - 600) // 2
im.crop((0, top, 360, top + 600)).save("preview.png", optimize=True)
print(Image.open("preview.png").size, os.path.getsize("preview.png") <= 2_000_000)

Checks before you create the media entities

Upload the tile and the logo as separate IMAGE media, then confirm the sizes and the transparent background of the logo before the creative request. The preview headline is part of the same preview, so write it to stand on its own at 55 characters or fewer. If you would rather not make a static tile at all, the dynamic preview variant pulls the tile image from the product set, and the work moves to the quality of your catalog images, covered in Snap DPA for Sponsored Snaps.