Fun Express Child's Train Conductor Hats (12 Pack), 8-1/2" Go to amazon.com Related posts List of the Top 10 engineers hat kids you can buy in 2019 Feature12 Hats per orderCotton 8 1/2" x 7 1/2"Adjustable plastic bandFits most childrenAccessories not included DescriptionChild's Engineer Caps. Cotton 8 1/2" x 7 1/2" caps with an adjustable plastic band. One size fits most children. You will get one dozen of these hats.