Lumpia wrappers are typically, round, thin wrappers made from flour, cornstarch, eggs, water and sometimes butter. They look much like a typical thin crepe. The thin wrappers are used to make Lumpia rolls. Lumpia is a Filipino egg roll which is deep fried or sometimes served fresh.
Many times spring roll wrappers are sold as lumpia wrappers as well. These are typically made with tapioca starch (flour) salt and water.
You can find lumpia wrappers in the frozen food section of most Asia grocery stores. You may find them online on Amazon.com, Walmart.com or Target.com.