Stained Glass Layout System - Rounds Set the biggest round panel you would like to build; the kit composes every size up to it. Longest pieces sized to fit your printer. $6.99 FROM $14.99 printed & shipped Snap-together arc segments that hold a true circle while you build it. Pick the smallest and largest round you work in and the kit solves every size between, so one box lays out a whole range of circles. Configure & buy A circle is the hardest thing to eyeball and the easiest thing to get wrong. These are the forms that hold one: flat arc segments that snap end to end into a ring you can build against, in the same 15 mm band and on the same clip as the straight bars. The number on the segment is the opening you get. There are no corners to add anything — each segment's tab lands in its neighbour's socket, so end face meets end face and the bodies close a full circle. The inside faces are cut so their flats sit exactly on the nominal circle, never inside it, because a form that measures under is a form the glass will not fit. The case is sized from the kit it has to hold, with a hinge that prints in place and comes off the plate working. HighlightsYou set the range, not the partsSay the smallest and largest round you build and the kit is solved from it, in 50 mm steps.The inside diameter is exactThe arcs are faceted so their flats sit tangent to the nominal circle — a 100 mm round measures 100.000, never under. Verified by ray-casting the assembled ring.Clips onto the straight kitSame clip, same 15 mm band, same 4.5 mm thickness, so curves and bars snap together into one layout.Engraved diameters, two-color readyEvery segment is labelled 0.8 mm deep with a matching flush inlay, so the size reads at a glance.Split to fit your printerEach circle is divided into as many segments as your bed can take, so the big rounds still print.Case sized to the kitA hinged case solved from the pieces it holds, with a print-in-place hinge. Configure & buy In your downloadPrint-ready 3MF platesEvery part laid out on plates packed to your printer's bed and sorted by filament color — open in your slicer and go.Every STLThe individual part meshes as well, if you'd rather arrange the plates yourself.A parts listA manifest of every part and how many of each, so you know exactly what you're printing.An assembled 3D model in your colorsThe whole thing built and colored the way you configured it — your reference while you print and put it together. Configure your kit Units MeasurementsMetric — millimetresImperial — inches This sets the diameter ladder and what is engraved on each segment — 100–400 mm in 50s then 100s to 1000, or 4–16 in in 2s then 4s to 40. It interchanges with the straight kit: same clip, same 15 mm band, same 4.5 mm thickness, so a curve snaps onto a bar. Range of rounds you want Smallest100 mm150 mm200 mm250 mm300 mm350 mm400 mm500 mm600 mm700 mm800 mm900 mm1000 mm Largest100 mm150 mm200 mm250 mm300 mm350 mm400 mm500 mm600 mm700 mm800 mm900 mm1000 mm These are inside diameters — the opening you build inside, not the outside of the ring. You get 7 complete circles, every size from the smallest to the largest — 50 mm steps up to the middle of the range, wider above it, where 50 mm stops being a difference you would notice. Printer Printing onKobra 3 — 250×250×260 mmKobra 3 Max — 420×420×500 mm *Kobra S1 — 250×250×250 mmKobra S1 Max — 350×350×350 mmA1 — 256×256×256 mmA1 mini — 180×180×180 mmH2D — 325×320×325 mmP1P — 256×256×256 mmP1S — 256×256×256 mmP2S — 256×256×256 mmX1 Carbon — 256×256×256 mmX1E — 256×256×256 mmX2D — 256×256×260 mmEnder-3 — 235×235×240 mm *Ender-3 V3 — 220×220×250 mmHi — 260×260×300 mmK1 — 220×220×250 mmK1 Max — 300×300×300 mmK1C — 220×220×250 mmK2 — 260×260×260 mmK2 Plus — 350×350×350 mmK2 Pro — 300×300×300 mmK2 SE — 220×215×245 mmK3 — 260×260×260 mmSPARKX i7 — 260×260×256 mmSPARKX i8 — 260×260×255 mmCentauri Carbon — 256×256×256 mmNeptune 4 Max — 420×420×480 mmNeptune 4 Pro — 225×225×265 mmCreator 5 Pro — 256×256×256 mm *KP5 — 220×220×220 mm *CORE One / One+ — 250×220×270 mmCORE One L / L+ — 300×300×330 mmMINI+ — 180×180×180 mmMK4S — 250×210×220 mmXL — 360×360×360 mmQ2 — 270×270×256 mmX-Max 1 — 290×240×300 mm *Custom bed… Case Every kit comes with its case, and the case is solved from the kit rather than picked — sized so the biggest arc lies down inside it with room to be put away by hand, not just to the millimetre it would fit at a perfect angle. Its hinge prints in place and comes off the plate already working. Colors Primary⇆SecondaryIts own colorSame as primary⇆TertiaryIts own colorSame as primarySame as secondary The size engraved on each segment is a flush inlay, 0.8 mm deep with its own part — so on a multi-filament printer the numbers come out in the second color. On a single-extruder printer, print the arcs and skip the inlays: the engraving still reads. Price: $6.99 Update 3D preview Click “Update 3D preview” to see your rounds in 3D. How would you like it? Digital download — print it yourself$6.99 (the printable files) Printed — we print and ship to youFROM $14.99 (exact price once you preview it)