Slider (sandwich)
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A slider is a small sandwich that is made with a bun. They are about 2 inches (5 cm) across. The sandwiches are served as appetizers, snacks or entrées.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/A_party_tray_of_sliders_at_a_restaurant.jpg/368px-A_party_tray_of_sliders_at_a_restaurant.jpg)
The word "slider" was first used by the restaurant chain White Castle for the onion-steamed small burgers they make at their restaurants.