Quick answer
Start with the number of qualified conversations you expect, not total event attendance. Estimate the people you can realistically engage, decide what percentage should receive the main item, add a modest buffer for staff and unexpected traffic, and use a replenishment plan for products that can be shipped after the event.
Use qualified traffic as the starting point
Attendance is a useful context number, but it is rarely the correct quantity for booth merchandise. A conference with 10,000 attendees may produce only 300 meaningful conversations at one booth. Ordering for all 10,000 creates leftover inventory and forces a low-quality giveaway strategy.
Estimate the number of people your team can speak with during the event. Consider booth size, staffing, open hours, expected traffic, and whether the item is reserved for qualified leads or offered broadly.
A simple event-swag formula
For example, if your team expects 600 useful conversations and wants to give the main item to 70% of those visitors, a 15% buffer produces approximately 483 units. Round the final number based on packaging, case quantities, and whether replenishment is practical.
- Qualified conversations — the realistic number of people your team can engage well.
- Recipient rate — how selective the item should be. Premium products usually use a lower rate.
- Buffer — extra units for staff, damaged packaging, unexpected traffic, and uneven demand.
Match the item to the distribution strategy
Not every event item should be ordered at the same quantity. Use different tiers so the product and the conversation support each other:
- Broad-reach item — a lower-cost, easy-to-carry piece for a large number of visitors.
- Conversation item — a more useful product given after a substantive conversation.
- Follow-up gift — a premium item shipped later to a qualified prospect or customer.
- Staff kit — reserved apparel, credentials, and practical supplies for the team working the event.
This layered approach avoids the false choice between ordering too few premium items and ordering too many generic ones.
Account for sizes, colours, and shipping
Apparel needs an additional planning layer. Use historical employee or event data when available, and avoid treating one size as the default. If the event is in a warm climate, lightweight pieces may outperform outerwear. If attendees are carrying luggage, compact items are easier to take home.
Check production and delivery lead times before approving the quantity. A lower quantity delivered on time is more valuable than a larger order that arrives after the booth closes. If the vendor supports replenishment, keep a small reserve and ship follow-up gifts from a central location.
What to do with leftover event swag
Leftovers are not automatically waste. Plan a second use before ordering: new-hire kits, client meetings, partner events, employee recognition, or a private company store. Store the items with their counts, sizes, decoration details, and recommended next use so the next team can find them.
After the event, compare the estimate with actual conversations, items distributed, leads captured, and follow-up conversion. That record makes the next event quantity more accurate than any generic industry benchmark.