Converter round → square 25 → 30, 32 → 40, 40 → 50 mm with placeholder bases (our own plain bases, no miniatures)

Tabletop accessories

Converter round → square 25 → 30, 32 → 40, 40 → 50 mm – single adapters

Single adapters from round bases to square bases: pocket Ø nominal + 0.4 mm, outside target − 0.2 mm, 3.0 mm high. Only the pairs where the wall is thick enough.

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€1.49incl. VAT

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Description

Want miniatures on round bases to join a formation of square bases? The round base goes into the round pocket, and the adapter has the outside size of the square base.

  • Only pairs that work: wall at the narrowest point 25 → 30: 2.2 mm, 32 → 40: 3.7 mm, 40 → 50: 4.7 mm. Minimum wall 1.2 mm.
  • Fits our trays: outside 0.2 mm under the target size, the tray recess is nominal + 0.4.
  • 3.0 mm high, floor 1.2 mm, printed flat without supports. No magnets: the pockets guide the bases sideways, they sit loose in them.

In the set: All three single adapters (25 → 30, 32 → 40, 40 → 50 mm), each as its own file. Print as many as you need. The stated print time, filament amount, dimensions and weight refer to one 25 → 30 mm adapter only, not to the whole set.

Dimensions: Basis: nominal sizes of common plastic bases (retailer tables), foot sizes from a public measuring template. Pocket Ø nominal + 0.4 mm (0.2 per side) with lead-in, outside target − 0.2 mm. Real bases differ from the nominal size by up to about 1 mm depending on the maker (mostly smaller, ovals partly wider). If your bases only fit a larger clearance stage of the test set, scale the file in X and Y only in the slicer: factor = (nominal size + wanted clearance) ÷ (nominal size + 0.4). The 0.4 mm clearance is our assumption in the middle of the 0.3 to 1.0 mm range that trays on the market use; there are no measured foot sizes for 30 mm square bases, the outside follows the nominal size (estimate). Our part has not been printed or tested yet. Print the free fit test set first: it shows with your own bases and printer which clearance fits.

Material: PLA, 0.4 mm nozzle, ideally 0.12 mm layers, no supports; PETG works too. PLA deforms in a hot car, so do not leave the parts there.

Made by base size, not for a particular game; no miniatures included.

Not a toy. Accessory for tabletop hobbyists aged 14 and up; contains small parts that can be swallowed, not for children under 3 years. No miniatures included. No connection to game or base manufacturers. Nothing load-bearing.

Dimensions

Width30 mm
Height3 mm
Depth30 mm
Weight (printed)2 g
Layer height0.12 mm
Walls2
Infill15 %

Dimensions and weight refer to one 25 → 30 mm adapter in print orientation, not to the whole set.

Material and temperature

Print trays, converters, smooth bases and flight stands in PLA (0.4 mm nozzle); PETG works too. The textured bases are meant for resin; FDM with a 0.2 mm nozzle is the alternative. With resin: wear gloves, follow the resin manufacturer's instructions and cure the parts fully. Also make sure the room is well ventilated.

Print orientation: Flat, as the files are laid out, no supports.

Safety notice

Not a toy. Accessory for tabletop hobbyists aged 14 and up; contains small parts that can be swallowed, not for children under 3 years. No miniatures included. No connection to game or base manufacturers. Nothing load-bearing. Not a toy. Accessory for tabletop hobbyists aged 14 and up; contains small parts that can be swallowed, not for children under 3 years. No miniatures included. No connection to game or base manufacturers. Nothing load-bearing.

Not an original part. No affiliation with the manufacturers named; brand and model names only indicate fitment.

What's included

You get one ZIP with:

  • STL – print-ready mesh
  • 3MF – with print profile
  • STEP – editable in CAD

Printing

  1. PLA (or PETG), 0.4 mm nozzle, 0.12 mm layers, 2 walls, 15 % infill, no supports.

FAQ

Which material should I use for this tabletop accessory?

Recommended: PLA (alternatively PETG). Print trays, converters, smooth bases and flight stands in PLA (0.4 mm nozzle); PETG works too. The textured bases are meant for resin; FDM with a 0.2 mm nozzle is the alternative. With resin: wear gloves, follow the resin manufacturer's instructions and cure the parts fully. Also make sure the room is well ventilated.

Do I receive a printed part?

No. You get the print files and print the part yourself or use a print service. You get the download link right after payment.

Why is there no 28.5 → 30 mm?

The wall would be only about 0.5 mm at the narrowest point, which is too thin for FDM printing.

What about round 25 to square 25 mm?

There is no room for a wall. For that, the set “Skirmish trays for 25 mm round bases” includes trays on the 25 mm grid, base to base.

Have you printed and tested the part?

Not yet. Our part has not been printed or tested yet. That is why you should print the free fit test set first and then a single part.

Do the bases stay in without magnets?

The pockets guide the bases sideways, so they move along when you slide the part across the table. They sit loose: if you lift the part at an angle they can fall out. Magnets are not intended.

My bases sit too tight or too loose. What now?

Real bases differ from the nominal size by up to about 1 mm depending on the maker (mostly smaller, ovals partly wider). If your bases only fit a larger clearance stage of the test set, scale the file in X and Y only in the slicer: factor = (nominal size + wanted clearance) ÷ (nominal size + 0.4).

Is this for a particular game?

No. We build by base size and name no games or makers. Which base size and which formation you need is in your rules.

Reviews

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    How we check reviews: only people who bought or downloaded the file for free in our shop can review, via the personal link from the download email; once per order and file. Anyone who received the files in return for something (cooperations, gifts, 100% codes) cannot review. We publish all reviews, negative ones too, and only remove unlawful content or spam. There is no reward for reviews.

    Version 1.0.0, updated 6 November 2026 · SKU F2-TT-CONV-RD-SQ

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