Heather Langenkamp Signed Photo Portrayed Nancy in. Nightmare on Elm Street. Details: The overall measurement of the item is approximately 4 1/4″x7 1/4″. You will receive the exact item pictured. This photo has been certified authentic and. Encapsulated by PSA (one of the top three third party authenticators). You can input the number located at the top of the encapsulated item into their website to verify authenticity. Add everything to your cart and check out all at once. Items are always packed securely- ensuring your items arrive in the condition you see here.