These sounds are flat on one end so that you can hold on to them easier. There are fourteen different sizes from .164 inches up to .663 inches so you will never be bored and you can get the perfect fit. They will arrive in a leather case so you can keep them all together. This is a popular kit due to the many sizes to play with. This is made out of Chrome Plated Brass so it is made to withstand the elements. About 7 1/2 inches long with a slight curve, they have about 5 1/2 inches of insertable length. You should never force anything of course though, as soon as you start to feel pain or resistance; it's time to move to a smaller sound. It is very important when using sounds please use common sense and do your homework before you start.