- This listing consist of Handmade Glassblowing Christmas tree glass ornament. - Dimensions:- Height: 4.75 inch (12 cm) width:3.55 inch (9 cm) - Material is Pyrex glass - Regarding color after complete glassblowing process glasses enter the oven at 500c degree then painted and enter the oven again at 500c degree to get color stabilization. If you have any questions or concerns, please let us know and we will be more than happy to help! Kindly check out our other Handmade Glass Items. (PLEASE CHECK OUR OTHER CHRISTMAS TREE GLASS ORNAMENTS AND TREE TOPPER WE HAVE MORE THAN 80 DIFFRENT DESIGN )