How big is the warming surface?

About 23-3/4 inches wide and 7-3/4 inches deep. That is long and narrow, so it suits rows of smaller dishes more than one large platter.

No. It is an electric tray that plugs into an outlet, so keep it near a socket.

Can I put it in the dishwasher?

No. The tray is hand wash only; the non-stick surface should be wiped clean.

Keeping already-cooked food warm during serving, such as at a buffet, holiday meal or party.

No. It is a warming tray, meant to hold dishes at serving temperature, not to cook them.

At Wayfair, for $112.02, as of our latest check.

7 stores we checked sell it, including Wayfair, Walmart, eBay, BuyDig.com, vminnovations.com.

$112.02at WayfairChecked 2 h ago

Compared across 8 stores. Prices are checked against each store and labelled with when.

It checks today's price at every store, compares the alternatives and answers in about a minute.