# A spike mark is written for furniture, not people > A spike mark is a cross of tape laid on an empty stage so a chair can return to the exact spot it started from, then it's meant to vanish under that chair once the show is running. August 19, 2026 · https://justog.club/stories/spike-mark-tape-cross Eleven crosses of gaffer tape, seen straight down, scattered across an otherwise bare floor. Fluorescent yellow and pink against near-black, a few laid over older marks that have been half peeled away. None of them are meant to still be there once the house opens. ## What is a spike mark actually marking? Where something goes back to, exactly, without anybody needing to see it happen. A stage manager or a designer walks an empty stage before a show is built and marks the floor for every piece that has to land in a precise spot — a table, a rostrum, a performer's own starting point. The marking happens during the same get-in that fills [a running order board with cue-by-cue times](/stories/backstage-running-order-board), and the mark itself is the only record of a position that a set of legs, or a pair of feet, has to find again in a blackout, days or weeks after it was first measured. ## Why a cross rather than a dot or a straight line? Because a chair has a facing as well as a location, and a dot only gives you one of those. A dot tells a stagehand where. A cross, laid so its arms sit parallel to the object's own edges, tells them where and which way it was turned. Furniture that's spiked a few degrees off looks fine to an audience and wrong to everyone who set the scene the first time, so the extra information earns its place. An L does a version of the same job for something with only one edge that matters — a rostrum corner, a flat's foot. ## How is this different from glow tape? They solve different problems, and neither one is a smaller version of the other. [Glow tape](/stories/glow-tape-in-the-dark) charges under work light and keeps giving that light back after everything else goes dark, which is what lets it mark a step edge somebody could fall down in a total blackout. A spike mark doesn't store anything — it's fluorescent pigment catching whatever light is actually in the room, which means some light has to be present for it to be read at all. One is there so nobody gets hurt. The other is there so a table looks like it never moved. ## Can a real production's floor marks go on a shirt? Nobody owns a cross of tape, and no theatre owns the practice of laying one. What would need permission is a specific production's actual plan, or a named venue's floor credited as that venue's. An invented set of marks for an invented floor carries none of that paperwork and reads exactly as honest, because the object itself was never anybody's proprietary information. Style has no owner here. A particular company's particular record does. ## Does the idea work outside a theatre? Anywhere something has to return to a spot nobody's going to remeasure, yes. A photography studio spikes a light stand's feet the same way. An outside broadcast marks a presenter's position on a studio floor for the same reason a designer marks a chair. The people who'd recognise this on a shirt aren't only theatre crew — they're anyone whose job includes putting something back exactly where it was, from memory, in low light. ## Isn't a half-peeled-up old mark just mess, not craft? It's a floor's history, and it's more honest than a clean one would be. A stage that's had one show on it has one set of marks. A stage that's had ten has nine sets underneath the current one, in whatever colour each production picked, most of them ripped up in a hurry between get-outs. Nobody spends the time to lift every trace before laying the next set — there's a get-in to finish — so the marks pile up, and a floor that shows that isn't neglected. It's worked. ## Does it print well? Yes, provided the marks stay marks and don't get smoothed into a pattern. Two colours plus white on a dark ground keeps the flat fields the print process actually holds onto — fluorescent yellow and pink read as themselves on fabric in a way a softer, blended colour wouldn't. The tape edges should stay hard and a little uneven rather than cleaned up into perfect rectangles, and the half-peeled marks want to look genuinely torn, not stencilled, or the drawing loses its point. ## How do I get one made? Describe your own floor at [JustOG](/) — how many marks, which colours, how worn the older ones underneath should look. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped. Designs other people have published are in the [shop](/shop). Eleven crosses, and by the time anyone's watching, every one of them is under something.