This is our 36 piece set of TreeBlocks without bark They are crafted in Vietnam in a sincerely fair and ethical manner They are unit blocks precisely cut into 2cm increments for mathematical soundness in building They re based on the metric system because increments of 10 are intuitive and used by the majority of the world Features . Tree Blocks uses only materials in our toys which are of the lowest environmental impact possible. Today 95 of materials used are from sustainable sources. We will continue to use only non toxic. Child safe finishes and to test each toy for safety before offering it for sale. 36 piece bark less blocks in cotton sack. Made with reclaimed and sustainably harvested materials. Each piece is precisely cut in heights of 2 4 6 8 and 10 cm. Made in Vietnam Specifications . Weight 6 lbs