If the sticky tape roll is standard size, there was a photo of a smaller HO layout published in MR half a century or so ago. It consisted of a circle of rail on ties, gauged to a silver dollar. The train ("Locomotive...without cars, carrying markers," Josserand, Rights of Trains.) was a Varney 'Little Joe' dockside 0-4-0T.
Who said HO was too big?
Chuck (modeling Central Japan in September, 1964)