There are a lot of different shapes and styles of candles.
Most of the candles that have a shape are pillar candles. These are candles that are placed on a candle plate on a flat surface away from anything that can catch fire such as paper, curtains, flowers or any cloth.
Some of the shapes of candles are round, square, octagon, pyramid and diamond. Even these shapes can have different styles.
Round, square and octagon shaped candles can have either a flat top or a concave top (which is a sunken top). Most candles have the flat top instead of the concave top. In addition to having a concave top as a style, these candles can also have scalloped edges giving the candle a look of bamboo.
Pyramid and diamond shaped candles usually have straight corners. You can find some that have a more rounded corner, but these are not as common.
Another style of candle is the container candle. These are candles that are in jars, times or other types of containers. These containers have lids that can be used to extinguish the candle. These containers can come in various looks. You can have a clear glass container where you can see the color of the candle or a tin candle that can have a design on the tin. The tins are usually customized toward a season such as Christmas or Halloween.
There are container candles that are in various types of glass such as wine glasses, champagne glasses, coffee glasses or a variety of other types of glasses. These glasses can also be reused after all the wax has come out of the glass.
Another style of candle is the votive. These candles are smaller, usually 2-3 inches tall. They can either be a pillar candle or in a container. Even the votive candles can have different shapes. They can have flat tops, rounded tops, triangle top or a top with some kind of design. They can also be cupcakes, pumpkins, ghosts, leaves, flowers, etc. You can get just about any shape of a candle you want. Just ask the person making the candle if they can make a specific shape.