虽小 is a conjunction meaning 'though small' or 'although small'. It combines the contrastive particle 虽 (suī), which introduces a concession ('although', 'even though'), and the adjective 小 (xiǎo), meaning 'small'. Together, they form a compact phrase used to acknowledge a limitation or modest quality while implying that something else—often a positive outcome, value, or effort—remains significant despite it. It typically appears at the beginning of a clause, followed by a comma or directly linked to a main clause with contrasting content.

This expression is common in spoken and written Chinese, especially when emphasizing resilience, humility, or unexpected impact. It often appears in descriptions of objects, efforts, spaces, or contributions—e.g., a tiny room that’s cozy, a small gesture that means a lot, or a brief meeting that yields big results. While grammatically similar to 虽然…但是…, 虽小 is more concise and literary, frequently used in balanced, slightly formal or reflective statements.