When carrier tape Classified by width as follow:

The carrier tape is also divided into different widths depending on the size of the
electronic components carried by the package.

Common widths are 8mm, 12mm, 16mm,
24mm, 32mm, 44m, 56mm, etc. With the development of the electronic market, the chip has a smaller and smaller trend, and the carrier tape has also developed in a precise direction.

Currently, there is a carrier tape supply of 4 mm width on the market