Keyguard for the HP Chromebook Model 14, the one with the B&O speakers.

Keyguards for keyboards and laptops default to 3/16" clear acrylic.  1/8" acrylic styrene is available for users who require the openings to be shallower, and a number of 1/4" thick materials are available if you want the openings to be deeper. Polycarbonate is a popular choice because of its nice, beveled edges and a lifetime guarantee against breakage.

Because of the limited room around the keys, no attachment method is provided with this keyguard.  You'll need to attach it yourself with something like double-sided tape, Velcro, or mounting putty (Blu Tack, etc.)