Start with established dimensions
Three-quarter, Olympic queen, short queen, RV king, and several truck sleeper formats are sold as listed size options by specialist brands. You may be able to choose one directly without requesting a custom design.
When a custom order makes sense
Cut corners, unusual curves, a tapered platform, or dimensions absent from the standard selector may need a custom quote. Draw the shape clearly and ask the seller how they want measurements supplied. Do not assume a custom build includes a home trial.
Get the specifications in writing
Confirm the drawing orientation, dimensions, tolerance, height, cover, firmness, foundation, production timing, and return policy before production begins. If storage hinges underneath, ask specifically about folding or flexing the selected construction.
Keep a practical comparison
Compare a custom quote against any listed size only when the seller confirms it is suitable for your bed. A smaller rectangular mattress may be cheaper but leave an unsafe or inconvenient gap, particularly on bunks. The bed maker’s requirements come first.
Research notes
Size examples and product distinctions are based on the manufacturers’ published specifications. For an exact product, use its model guide and linked sources.
