Personalised Plain Acorn Keyring It takes a big heart to shape little minds. Say thank you by giving an acorn to a teacher with our personalised keyring. Acorn shaped keyring. Engraving on front of acorn only. Maximum 50 characters including spaces. *Internal use is advised; our wooden keepsake keyrings have not been designed for the hard knock life of car keys. Size 4cm x 4.5cm. Material Laminated maple veneer.