What is the mass of the game pieces?

Stars: 270 grams, ± 15%

Cubes: 760 grams ± 15%

Sorry about the awkward “plus/minus” notation, but I think you get it.

Thank you. Designing the robot already and i needed some mass to be able to figure out how much support i need. Much love from 5245 A and B

No problem.

Those specifications are listed here, as are the dimensions of the stars and cubes:

http://link.vex.com/docs/vex-starstruck/VEX-starstruck-Appendix-A-Field-Specifications