t seems like "TOH" might be an abbreviation or specific to a certain game or system that I'm not familiar with. Movement trays are commonly used in various tabletop wargames to organize and move miniatures, but the "TOH" designation isn't immediately recognizable in the context of movement trays in tabletop gaming.
If "TOH" represents a specific game, setting, or rule system, the movement trays designed for that context would likely accommodate three 25mm-based figures in a manner consistent with the rules or unit sizes of that particular game. Movement trays can vary in size, configuration, and design based on the requirements of the game system they're intended for.
Generally, movement trays streamline gameplay by allowing players to move multiple miniatures as a cohesive unit. They're typically designed to securely hold and organize miniatures while making it easier to maneuver them on the gaming surface.
If there's more specific information about the game or context in which these "TOH" movement trays are used, I might be able to provide a more accurate description or understanding of their function within that particular gaming system.