Specification:
- Material: Paper
- Size: 16x21mm
- Conversion: 1cm=0.39inch, 1inch=2.54cm
- Package include: 24PC*Books

Notice:
1.Please allow 1-3mm error due to manual measurement,Please make sure you do not mind before you bid.
2.The colors may be a little difference for the different monitors displays, please understan.