35 x 136 cm I purchased this but have kept it in storage without using it. I purchased it around August 2025. I opened the package, but ended up not using it. There are 20 sheets. I hope to pass these on to someone who needs them. Would they be suitable for lessons? Please purchase only if you understand that the item will be simply packaged using recycled cardboard, etc. Returns are not accepted. I usually ship items almost immediately. I am not familiar with this product, so please understand that I may not be able to answer detailed questions.