Claiming a Plot

Obtain a plot claim item.
Plot Sizes
Common plot sizes are:
Size
Area
Small
70 x 70 blocks
Medium
120 x 120 blocks
Large
250 x 250 blocks
XLarge
400 x 400 blocks
XXLarge
600 x 600 blocks
Preview Colours
The preview helps you check the plot before confirming.
Preview
Meaning
Green
The plot can be placed here
Red
The plot overlaps or collides with another plot
If the preview is red, cancel and try a different location.
Claiming a Plot- JAVA
To start claiming:
Hold the plot claim
Right-click a block
A preview appears. You can also use 
/map to open the map link and check the precise placement of your plot.
The block you click becomes the fixed starting corner for the claim preview.
The plot extends away from where you are facing. Sneaking while starting the claim changes the sideways orientation.
After the preview appears:
Left-click to begin confirmation
Wait for the countdown
Left-click again when prompted to confirm
If the claim is cancelled or fails, your claim item is returned. Scrolling off the item, putting the item in your offhand, and waiting too long will all cancel a claim.
Claiming a Plot- BEDROCK
To start claiming:
Hold the plot claim
Click the ground
A preview appears. You can also use 
/map to open the map link and check the precise placement of your plot.
(It's suggested to open the map before claiming on bedrock)
The block you click becomes the fixed starting corner for the claim preview.
The plot extends away from where you are facing. Sneaking while starting the claim changes the sideways orientation.
After the preview appears:
Click the air to begin confirmation
Wait for the coundown
Click the air again when prompted to confirm
If the claim is cancelled or fails, your claim item is returned. Scrolling off the item, putting the item in your offhand, and waiting too long will all cancel a claim.
Refunding the Plot Claim
If you place a new plot and then decide you want it somewhere else, use 
/plot delete within 24 hours to remove it and receive a refund of the plot claim item.
You can then place the plot again in a different location.
This will not work on "available" plots or extending a plot lease.
Existing Plots
Using a matching-sized plot claim on an existing expired or "available" plot will start a confirmation to renew, extend, or claim the land.
Follow the messages shown in chat. Left-click confirms after the countdown (Or clicking the air for bedrock).
If an Old Claim Item Does Not Work
Contact a mod or make a ticket using /ticket create (comment) or by going to discord and opening a #support-ticket!