There is no limit to the number of designs that you can submit to a contest. Designer participation on contests is typically higher when the client provides a good description and actively provides feedback while the project is active.
We discourage contest spamming, which involves submitting multiple design entries that are nearly identical. If you’ve made a small revision to your design, then we suggest sending the edits to the client with a private message (see how to send messages).
Note: If a contest has a payment pending status, it’s generally best to avoid sending the CAD files with private messages. Clients can download files sent in private messages but must make a contest payment before they can download design entries on their contest page.