A small number of people; a gathering with few participants—used to describe meetings, events, or groups with low attendance.
小人数のクラスは質問しやすく、学習に向いていると言われる。
Small classes are said to make it easier to ask questions and are good for learning.
今回は小人数で食事会を開く予定です。大人数だと場所が狭いので。
This time we plan to have a dinner with a small group. It's cramped for a large number of people.
小人数制のツアーは臨機応変に対応できるのが利点だ。
A small-group tour has the advantage of being able to respond flexibly.