Final answer:
The truthfulness of the statement about the minimum order length for wooden frames and related materials cannot be determined without context from a specific supplier. Minimum lengths can vary greatly based on the supplier's product offerings.
Step-by-step explanation:
The statement that 'The smallest length of wooden frame, stretcher bar, liner or fillet you can order is 4.5' is likely specific to a particular supplier or set of suppliers; therefore, without additional context regarding the vendor or industry standards, it is impossible to declare the statement as universally true or false. In the context of ordering materials for art frames or canvases, the minimum lengths available can vary greatly based on the supplier's product range and their manufacturing capabilities. It is common for suppliers to offer a wide range of sizes, potentially starting from smaller lengths than 4.5 inches, so it's advisable to check with specific suppliers for their minimum lengths.