Stylish Silver 'Singing Lesson' - Do Not Disturb, Door Sign, Door Hanger. Perfect for use in schools, on classroom doors and music rooms doors. A great addition for singing teachers / singing tutors to keep people from disturbing their lessons. Light and easy to use, portable to carry round and use anywhere. ENGRAVED - with singing icon on front, plain black on reverse. PERFECT SIZE - 145 mm tall x 75 mm wide DURABLE - Made from 3mm metallic brushed silver acrylic SCHOOL - Ideal for use on classroom doors and music rooms TEACHERS - Great for teachers / tutors to use PORTABLE - Hang on any classroom door, or music room, you are using to teach in Manufactured in Alnwick, Northumberland, UK. We have a wide range of Do Not Disturb Signs for work use, in the home or as novelty gifts. Please see all of our other listings.