Reddit Reddit Image Ad - Thumbnail (Conversation Placement) Ad Size
400×300px · 4:3
The recommended size for Reddit Reddit Image Ad - Thumbnail (Conversation Placement) ads is 400×300px (ratio 4:3). with a maximum file size of 500 KB.
Placement spec
| Recommended size | 400×300px |
|---|---|
| Aspect ratio | 4:3 |
| Max file size | 500 KB |
Design rules
- Used for conversation placement. Optional per some sources.
Frequently asked questions
What is the correct size for Reddit Reddit Image Ad - Thumbnail (Conversation Placement) ads?
The recommended size is 400×300px with a 4:3 aspect ratio.
What are the file format and size limits?
with a maximum file size of 500 KB.
Can I convert an existing banner to this size automatically?
Upload your original banner to ImageFactory banner resize and it is automatically converted to 400×300px and 1,400+ other placement sizes. For placements with a safe zone, AI keeps key elements inside the safe area.