Hello, Ross!
You can just go ahead and send us those details. Please be sure to include a the sketch or drawing. On that drawing or sketch, please include dimensions, measurements, and thickness of material.
If you are interested in other material options, we offer a selection if great alternative to our classic acrylic material. We have lucite, polycarbonate, plexiglass and virgin cast acrylic, which is also known as museum quality acrylic. All of these materials are a fantastic choice as they are all vastly more durable then glass and just as optically clear. They all also filter out UV rays which will help preserve any items you may be displaying from sun damage.
If there are any more question, you can also include those in the following email with your custom acrylic counter-top display box details.
Thank you!