wearing a balloon hat in 2015 Modellers will use an assortment of balloons, usually in various
colors. Balloon sizes are usually identified by a number: the most common size of twisting balloons is called a "260", as it is approximately two inches in diameter and 60 inches long. Thus, a "260" is 2×60 inches and a "160" is 1×60 inches when fully blown up. Although these are the most common sizes used, there are dozens of other shapes available as well. The most common methods for inflation are
air pumps similar to
bicycle pumps, electric
air compressors, and the mouth. Inflating a balloon with the mouth is difficult and can be dangerous. Particularly well-trained and talented twisters, however, can blow-up several balloons at once, and some can even blow up 160s, which are much more difficult to mouth-inflate than the more common 260s, as their narrowness requires a great deal more strength and breath pressure to inflate. ==See also==