| GAUGE | Distance between the rails of a railway track; the diameter of wire; or, the thickness of sheet metal (5) |
| CABLE | A line of wires or the message sent through them (5) |
| SLEEPER | One of a series of wooden beam-like structures supporting the rails of a railway track (7) |
| BULK | Word for the belly, body or trunk; a ship's cargo or hold; a heap of tobacco; a mass generally; the thickness of paper or a book; the greater part; or, dietary fibre/roughage in food (4) |
| LOFT | A pigeon shed; a roof space; the thickness of insulating matter in a duvet, sleeping bag or quilt; or, a warehouse/ factory converted into living space (4) |
| DENIER | Unit of weight used to describe the thickness of hosiery; or, the name of a Medieval coin struck wit |
| STAMDARDGAUGE | Of a railway track, having a distance of 4ft 8.5 in (1.435 m) between the lines (8,5) |
| STANDARDGAUGE | Of a railway track, having a distance of 4 ft 8 inches (1.435 m) between the lines (8,5) |
| NARROWGAUGE | Of a railway track, having less than the standard 1.435m distance between the lines (6,5) |
| CUSHIONS | Bumpers on the rails of snooker tables from which the balls rebound; or, the air-filled sections supporting hovercrafts (8) |
| CAROM | Bounce off the rail of a pool table |
| MIL | Unit of length measuring the diameter of wire |
| TRANSMISSION | A type of wire or line that carries radio waves from the radio transmitter to the antenna. (12) |
| GAGE | Measurement used to describe the diameter of wire (4) |
| SIEVING | Using a device consisting of wire or plastic mesh held in a frame, for (in gardening) separating coarser from finer particles, such as soil or compost (7) |
| MESH | A material made of a network of wire or thread (4) |
| RAILCAR | A wheeled vehicle adapted to the rails of railroad. |
| CAR | A wheeled vehicle adapted to the rails of railroad (3) |
| ETHIC | There's a moral in the thickness of thieves |
| MICROMETER | Device used for accurate measurements of the thickness of small components (10) |
