13.5" X 18-3/4". Bookplate?? rolled edges for safety and strength</br>Angle adjustment tension knobs?? easy removal from upper shaft</br>Friction locking knobs?? 1-3/16"nter shaft?? adjustments fully extend shafts from 24"to 45" and anywhere in between</br>Hi-impact plastic leg housing?? friction locking knobs?? Leg support straps?? non-slip rubber feet?? variable spreading legs</br></br>Product Description</br></br>The On Stage music stand is revolutionary?? incorporating all the features of the past with the new tripod folding base for the musician on the go. This stand can also fold up and nest together if you are staying in one place.</br><br/>http://www.amazon.com/gp/product/B0002F7IN00ult