From the update:
Acheson Creations announces the arrival of the next in their line of Two Hour Wargames products, the 15mm Gladiatorial Arena priced at $18.00USD (unpainted only at this time).
This piece from Two Hour Wargames is sculpted in 15mm (1/100 scale) and is 21.3cm (8 3/4 inches) in external diameter and 3cm ( 1 1/16 inches) external wall height.
The arena is made to be used with Red Sand Blue Sky - Heroes of the Arena, from Two Hour Wargames, but can be used for other rules as well. The RSBS grid is lightly molded onto the arena floor and makes it perfect for use with Red Sun Black Moon - Death in the Arena, the upcoming fantasy gladiator combat game.