We would like to replace the old corner sink in the powder room with an under-mount sink and a stone (granite/marble) countertop. The questions are:

1) how can we support the new stone countertop (by not having a vanity or legs underneath)? The expected countertop size would be at the maximum 20” x 20” only. Would brackets be enough to support the stone countertop? If so, please advise which types/sizes of brackets.

2) any idea on how to camouflage the look under the countertop and make it more tidy?

Any cool ideas on small powder room remodeling (3'x5') would be greatly appreciated. Thanks for reading.