If you are sold out and need to suspend your shares from sign up, you can follow these instructions:
1. Go to "Settings" and click "Shares"
2. Mark shares as "sold out" by clicking clicking "edit" next to the share
3. Click the "sold out" box
4. Add a sold out message to the share description
5. Click save
Signup Banner Message
To add a message to your sign up banner text to your sign up page, go to "My Farm" --> "Edit" --> Scroll down to the bottom and enter your sold out message
Your shares are now marked as sold out! They will still appear on your sign up page but no one will be able to sign up for them.
If you'd prefer to not have the sold out message you can skip those steps and click "Sizes" on the upper tab and then click the "Active" button and toggle to "Suspended" and click the checkmark