Which micrometer would be most suitable for measuring the inside of a small cylindrical object?

The inside micrometer is specifically designed for measuring the internal dimensions of objects, making it the most suitable choice for measuring the inside of a small cylindrical object. It typically features a set of adjustable arms or rods that can reach the internal surfaces, allowing for precise measurements of diameter or other internal dimensions.

This type of micrometer usually includes a vernier scale or a digital readout to enhance measurement accuracy. It's particularly useful in precision engineering and manufacturing contexts where exact internal measurements are crucial, such as for fitting parts together or ensuring components meet specific tolerances.

In contrast, the other types of micrometers are designed for different measuring tasks: standard micrometers and outside micrometers measure external dimensions, while dial micrometers, although versatile, are not optimized for internal measurements like the inside micrometer is.