It can be placed in the classroom to stimulate students interest in chemistry, or it can be placed in the laboratory. It is a very practical tool. A PROFESSIONAL TOOLEspecially designed for students, teachers and also for professionals in various engineering and scientific industries. It is ideal for teaching and inspiring. AN EXQUISITE DISPLAYGreat for display on desks and shelves. It is ideal for home,ice or school class decoration. Perfect gift for students, teachers and professionals. Dimensions: Small: 6*4.5*0.8 inch Medium: 6.7*4.8*1 inch Large: 7.9*5*1 inch Note: * It is a handmade product, so some displacement may occur.