Record both the length and width.
Install marble countertop on the wall.
Step 1 take proper measurements.
Step 7 dry time allow the countertop to set overnight after examining the installation to make sure an even consistent bond has been created.
Marble bathroom countertops come in various textures and color tones.
If the countertop is too large or too small contact the manufacture to adjust the fit.
Kyle you should install some sideways 2x4 or metal cross bracing under the plywood that extends from wall to wall at or near the front and again half way back of the countertop.
They are fairly easy to install and you will be very happy with the result.
Make sure to immediately clean up any excessive glue from the marble countertop.
If the fit is too large you can try to cut it to the correct size yourself with a circular saw but you risk splitting the marble.
Very rarely will you find walls perfectly square and straight.
Measure from the wall to the edge of the cabinets in multiple spots for both the width and length of the countertops.
It is best to have a professional adjust the fit.
This will remove all dust.
Measure the area in which you want to install the counter top.
Apply a wet wipe using alcohol run across all marble surface area before using the adhesive.