The full range of square to rectangle base converters laid out together, from 20mm square up to 150x100mm.

Square to Rectangle Bases Size Converters 3d Print Full Range

20mm Square to 50x25mm Rectangle Converters x1 pc
$2.52
$2.52
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The full range of square to rectangle base converters laid out together, from 20mm square up to 150x100mm.
  • The full range of square to rectangle base converters laid out together, from 20mm square up to 150x100mm.
  • Feature diagram of a square to rectangle base converter: recessed well, aligned top edge and open underside.
  • Technical drawing of the 20mm square to 50x25mm rectangle base converter, with dimensions in millimetres.
  • 20mm square to 50x25mm rectangle base converter, single piece, 3D-printed in PLA.
  • 20mm square to 50x25mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 20mm square to 50x25mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 20mm square to 50x25mm rectangle base converters, pack of 10, 3D-printed in PLA.
  • 20mm square to 50x25mm rectangle base converters, pack of 25, 3D-printed in PLA.
  • Technical drawing of the 20mm square to 60x30mm rectangle base converter, with dimensions in millimetres.
  • 20mm square to 60x30mm rectangle base converter, single piece, 3D-printed in PLA.
  • 20mm square to 60x30mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 20mm square to 60x30mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 20mm square to 60x30mm rectangle base converters, pack of 10, 3D-printed in PLA.
  • 20mm square to 60x30mm rectangle base converters, pack of 25, 3D-printed in PLA.
  • 20mm square to 60x40mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 20mm square to 60x40mm rectangle base converter, with dimensions in millimetres.
  • 20mm square to 60x40mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 25mm square to 50x25mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 25mm square to 50x25mm rectangle base converter, with dimensions in millimetres.
  • 25mm square to 50x25mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 25mm square to 50x25mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 25mm square to 50x25mm rectangle base converters, pack of 10, 3D-printed in PLA.
  • 25mm square to 50x25mm rectangle base converters, pack of 25, 3D-printed in PLA.
  • Technical drawing of the 25mm square to 60x30mm rectangle base converter, with dimensions in millimetres.
  • 25mm square to 60x30mm rectangle base converter, single piece, 3D-printed in PLA.
  • 25mm square to 60x30mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 25mm square to 60x30mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 25mm square to 60x30mm rectangle base converters, pack of 10, 3D-printed in PLA.
  • 25mm square to 60x30mm rectangle base converters, pack of 25, 3D-printed in PLA.
  • Technical drawing of the 25mm square to 60x40mm rectangle base converter, with dimensions in millimetres.
  • 25mm square to 60x40mm rectangle base converter, single piece, 3D-printed in PLA.
  • 25mm square to 60x40mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • Technical drawing of the 30mm square to 60x30mm rectangle base converter, with dimensions in millimetres.
  • 30mm square to 60x30mm rectangle base converter, single piece, 3D-printed in PLA.
  • 30mm square to 60x30mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 30mm square to 60x30mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 30mm square to 60x30mm rectangle base converters, pack of 10, 3D-printed in PLA.
  • 30mm square to 60x30mm rectangle base converters, pack of 25, 3D-printed in PLA.
  • Technical drawing of the 30mm square to 60x40mm rectangle base converter, with dimensions in millimetres.
  • 30mm square to 60x40mm rectangle base converter, single piece, 3D-printed in PLA.
  • 30mm square to 60x40mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • Technical drawing of the 30mm square to 75x50mm rectangle base converter, with dimensions in millimetres.
  • 30mm square to 75x50mm rectangle base converter, single piece, 3D-printed in PLA.
  • 30mm square to 75x50mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • Technical drawing of the 40mm square to 60x40mm rectangle base converter, with dimensions in millimetres.
  • 40mm square to 60x40mm rectangle base converter, single piece, 3D-printed in PLA.
  • 40mm square to 60x40mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 40mm square to 60x40mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 40mm square to 75x50mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 40mm square to 75x50mm rectangle base converter, with dimensions in millimetres.
  • 40mm square to 75x50mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 40mm square to 75x50mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • Technical drawing of the 40mm square to 100x50mm rectangle base converter, with dimensions in millimetres.
  • 40mm square to 100x50mm rectangle base converter, single piece, 3D-printed in PLA.
  • 40mm square to 100x50mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 40mm square to 100x50mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 40mm square to 100x60mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 40mm square to 100x60mm rectangle base converter, with dimensions in millimetres.
  • 40mm square to 100x60mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 40mm square to 100x60mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 50mm square to 75x50mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 50mm square to 75x50mm rectangle base converter, with dimensions in millimetres.
  • 50mm square to 75x50mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 50mm square to 75x50mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 50mm square to 100x50mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 50mm square to 100x50mm rectangle base converter, with dimensions in millimetres.
  • 50mm square to 100x50mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 50mm square to 100x50mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • 50mm square to 100x60mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 50mm square to 100x60mm rectangle base converter, with dimensions in millimetres.
  • 50mm square to 100x60mm rectangle base converters, pack of 3, 3D-printed in PLA.
  • 50mm square to 100x60mm rectangle base converters, pack of 5, 3D-printed in PLA.
  • Technical drawing of the 50mm square to 150x100mm rectangle base converter, with dimensions in millimetres.
  • 50mm square to 150x100mm rectangle base converter, single piece, 3D-printed in PLA.
  • Technical drawing of the 100mm square to 150x100mm rectangle base converter, with dimensions in millimetres.
  • 100mm square to 150x100mm rectangle base converter, single piece, 3D-printed in PLA.
  • The full range of square to rectangle base converters laid out together, from 20mm square up to 150x100mm.
  • Feature diagram of a square to rectangle base converter: recessed well, aligned top edge and open underside.
  • Diagram of the Open Basing System: bases, base converters, movement trays, shape adapters and hero bases.
Square to Rectangle Bases Size Converters 3d Print Full Range

Square to Rectangle Bases Size Converters 3d Print Full Range

$2.52
$2.52
Shipping calculated at checkout.
Key Dimensions · This Option
Fits base 20 mm square
Converts to 50 × 25 mm rectangle
Overall height 3.6 mm
Outer footprint 50.0 × 24.0 mm
Material 3D-printed PLA
Number of packs
In stock

Same-day dispatch before 3pm Mon–Fri · Free UK delivery over £70 · 30-day returns

DWG · Product Information

PROJ: CONV/SQ-REC/20-50x25/1 · SHEET 2 / 4

View · Overview

Product overview

Place a miniature on its square base into one of these converters and it occupies a rectangular footprint — no rebasing, no glue, no magnets, nothing removed from the model. It lifts out again just as easily, so one collection can play a rank-and-flank system such as Kings of War and go back to its square-based game afterwards. Sizes run from 20mm square up to 150×100mm, and each converter is 3D-printed to order in black PLA in the UK; we usually keep some stock, but we may need a while to process your order. The converters stack with the Open Basing System’s own bases, trays and other converters.

  • No glue, magnets or rebasing — the square base sits in a recess and holds by friction fit, and an open underside lets the base be pushed out without gripping the model.
  • Removable and reusable — one collection serves both square-based and rectangle-based games.
  • Textured top surface matches the rest of the range, and PLA takes primer and acrylics, so the converter can be finished to match existing basing.
  • 3D-printed black PLA, made to order in the UK — fine layer lines and a Z-seam are normal, not defects, and become less visible under primer.
  • Works with Open Basing System bases, movement trays and other converters.

Compatible with popular tabletop miniatures; not affiliated with, endorsed by or produced by Games Workshop.

Notes · Q & A

Can a converter change my base footprint without rebasing?

OBS converters are designed to adapt an existing base where the selected conversion route fits that original footprint. Fit is route-specific, so confirm the selected option and technical drawing before ordering. Check Technical Specifications where added height matters.

How do I choose the correct converter?

Start with the footprint you already have, then select the target footprint you need. Compare both the accepted inner fit and the outer footprint with the technical drawing; matching nominal labels alone is not enough.

How should I use the technical drawing?

Choose your option first, then use the technical drawing and Technical Specifications to check the physical dimensions of the product. When matching an existing part or accessory, use the drawing rather than relying on the product name alone.

Can I rely on the nominal size alone?

No. Products with similar nominal sizes can have different physical dimensions or fit differently across brands and systems. Check the technical drawing, specifications and any product-specific compatibility note before ordering.

Notes · Logistics

Shipping

Orders placed before 3PM (Mon–Fri) are dispatched same day. Free UK delivery on orders over £70. International shipping available.

Returns

If you're not happy with your purchase, contact us within 14 days for a full refund or exchange. Items must be unused and in original packaging.

Table · Specification

Technical specifications

Product details
Brand
Hobby Heaven
Product code
CONV/SQ-REC/20-50x25/1
Type
Base
Shipping weight
20 g
Conversion
Fits base
20 mm square
Converts to
50 × 25 mm rectangle
Geometry
Overall height
3.6 mm
Outer footprint
50.0 × 24.0 mm
Material & finish
Material
3D-printed PLA
Classification
Range
Base Converters
Format
Physical

Product

Square to Rectangle Bases Size Converters 3d Print Full Range

Code (proj)

CONV/SQ-REC/20-50x25/1

Ship. weight

20 g

Brand

Hobby Heaven

Hobby Heaven · Open Basing System

Sheet 2 / 4

End of sheet