When combined, these characters create a very visual and intuitive meaning: “Bending fingers, (one is) able to count (them all).” The number of items is so small that you can easily count them just by bending the fingers on one or both hands.
The use of body parts, especially hands, for counting is a universal human experience. This idiom's power lies in its instant relatability. In Chinese culture, using a `chengyu` like `屈指可数` is a sign of a good education and linguistic refinement. It elevates a simple observation about scarcity into a more classic and impactful statement. To compare it to a Western concept, it is very similar to the English phrase “you can count them on one hand.” Both expressions use the same physical metaphor to denote a very small number. However, there's a key difference in usage and formality. While “you can count them on one hand” is typically informal, `屈指可数` is a formal, fixed idiom that is perfectly acceptable in news reports, academic writing, and formal speeches. Using it demonstrates a command of the language beyond the basics.
`屈指可数` is used to describe a small quantity of almost anything, from physical objects to abstract concepts.