Yo-Yos are available in a wide range of shapes, designs, and materials. With so many options available, it is difficult to decide which one is best for you. The most obvious difference among yo-yos is shape. The Classic shape, also known as Imperial, consists of two semicircles with the flat sides facing each other. The Butterfly or Wing looks like an inverted classic, with the rounded part facing in.

Modified yo-yos are modern variants that combine characteristics of both models mentioned above. Modified yo-yos are the perfect choice for Rocking-the-Cradle and looping style tricks. If you are only buying one yo-yo, make it a modified model.

Most yo-yos are made of plastic, because it is both inexpensive and highly resistant. Plastic also gives the most options for colors and designs. Wood is the original yo-yo material and is still widely used, especially in old-fashioned and collector items, such as in the case of yo-yos made of maple. Aluminum yo-yos are also available, but they're generally expensive and more difficult to use, and are not recommended for novices.

The string that connects the two halves of a yo-yo is known as the axle. There are different types of axles. The most common is a fixed axle. Yo-yos with a fixed axle are usually made of a single piece of wood, so there are no rotating parts.

Transaxle and ball bearing axle yo-yos have either a simple sleeve or one with metal parts inside to make them spin faster and better. For beginners, clutch axle yo-yos are the best choice. They use centrifugal force to come back up after spinning.

There are essentially no differences when it comes to the strings used in yo-yos, although strings that are part polyester usually don't wear out as fast. Weight is a consideration when choosing yo-yos, since it has an influence on performance. Most yo-yos are Mid Range (45-50 grams or 1.6-1.8 oz.), but you can find models that vary in weight from Super Light (30-40 grams or 1.1-1.4 oz.) to Heavyweights (60-70 grams or 2.1-2.5 oz.). When it comes to price, mass-produced yo-yos are of course cheaper and can be bought for just a few dollars. Metal yo-yos and those that are handmade, painted, or carved can cost over 100 US dollars (USD).