The size entered on the web page is the size of the outer frame.
You need to ensure the size of upright and base and then draw a box to put these two parts into it.
Then the size of the frame is the size you need to enter.
The full version of the size of the decoration is the size of the entire frame, rather than the size of the decoration individual.
If you have specific size requirements can be marked in the design, otherwise the image processor will be equal scale layout.