Where this rule applies
National Museum of Natural History only; other Smithsonian museums have separate guidance.
Source update: Not stated.
Recorded bag limits
No complete numeric bag limit is recorded. Use the official restrictions and check with the operator before travel.
Before leaving
- Open the official source and check your route, ticket, event or exhibition.
- Measure your bag when packed, including protruding pockets and other parts counted by the operator.
- Check the number of bags, material or transparency requirements, and any storage conditions.
- Ask the operator about exceptions and accessibility or medical needs when relevant.
Passing a numerical size check does not confirm boarding or admission. Event-specific rules, staffing and available storage can change the outcome.
Official sources
- Smithsonian National Museum of Natural History official policy ↗Checked 2026-10-14