Store › Underfoot: An Itty-Bitty Fey RPG (Core Sourcebook- Paperback) Image 1 of 1 Underfoot: An Itty-Bitty Fey RPG (Core Sourcebook- Paperback) $25.00 A 8.5”x5.5” perfect-bound paperback copy of Underfoot. Ships to US only. Quantity: Add to Cart Added! A 8.5”x5.5” perfect-bound paperback copy of Underfoot. Ships to US only.