Rectangular Bases 75mm vs 90mm Deep: Which Size to Buy?

Quick answer

Choose 75mm deep rectangular bases when your models need a compact footprint that fits tighter movement trays or smaller display areas. Choose 90mm deep rectangular bases when you want extra front-to-back stability for larger or heavier models, or when your army’s basing scheme calls for a deeper profile.

How base depth changes stability and footprint

Depth is the front-to-back measurement of the base. A 75mm deep base gives you a shorter footprint, which can be an advantage when you need to pack several bases into a movement tray or when your gaming table has limited space. A 90mm deep base adds 15mm of extra length, which can improve stability for models with a long centre of gravity, such as cavalry or large infantry on scenic bases.

Both sizes are laser-cut from MDF, greyboard, or acrylic, so the material choice affects weight and durability more than the depth itself. If you plan to magnetise the base, a deeper base gives you more surface area for magnets, which can be useful for heavy metal models.

When 75mm deep is the better fit

The 75mm deep rectangular base is a good match for standard infantry and skirmish models that don’t overhang the front or back edge. It keeps your unit footprint tidy and makes it easier to align multiple bases in a movement tray. If you already own movement trays designed for 75mm depth, sticking with this size avoids gaps or overhang.

This depth also suits display boards and dioramas where space is tight. Because the base is shorter, you can fit more models into a fixed area without them looking cramped.

When 90mm deep is worth the extra length

The 90mm deep rectangular base gives you more room for dynamic poses, larger weapons, or integrated scenery. It’s a practical choice for models that tend to tip forward, such as those with a raised weapon or a wide stance. The extra depth also helps when you want to add texture or objects to the base without the model overhanging.

Keep in mind that a deeper base may not fit your existing movement trays or carrying cases. Measure your tray slots and storage before committing to 90mm depth.

Material and corner style: what else to decide

Both bases are available in MDF, greyboard, and acrylic, and with square or rounded corners. MDF is the standard choice for painting and gaming because it takes primer and texture well. Greyboard is lighter but less rigid, while acrylic is heavier and smoother, which can be useful for display pieces but may need different glue.

Corner style is mostly aesthetic, but rounded corners can reduce sharp edges that catch on tray walls. Square corners give a more uniform look when bases are lined up side by side.

Decision rules for choosing base depth

• Measure your movement tray slots: If your tray is designed for 75mm deep bases, stick with 75mm unless you plan to replace the tray. A 90mm base will overhang or not fit at all. Check tray depth before you buy; it’s the most common compatibility issue.
• Match the base to your model’s centre of gravity: Models that are tall, front-heavy, or have wide stances benefit from the extra depth of a 90mm base. Small infantry and skirmishers are usually fine on 75mm. If the model tips forward on a 75mm base, size up to 90mm.
• Consider your storage and transport: Deeper bases take up more room in foam trays and carrying cases. If storage space is tight, 75mm deep bases are easier to pack. Lay out your storage plan before choosing 90mm depth.
• Choose material based on handling: MDF is the most versatile for painting and gaming. Greyboard is lighter but more fragile; acrylic is heavier and smoother but may need specialist glue. For regular gaming, MDF is the safe default.

Product facts

• Rectangular Bases – 75mm Deep: Precision laser-cut rectangular bases, 75mm deep, available in MDF, greyboard, or acrylic with square or rounded corners. The 75mm depth keeps your unit footprint compact, making it easier to fit into standard movement trays and tight display spaces.

  

• Rectangular Bases – 90mm Deep: Precision laser-cut rectangular bases, 90mm deep, available in MDF, greyboard, or acrylic with square or rounded corners. The extra 15mm depth provides more front-to-back stability for larger models and leaves room for scenic basing without overhang.

  

Who should buy which depth

Best for

• Players with existing 75mm movement trays or compact storage
• Infantry and skirmish models that don’t overhang a 75mm base
• Display projects where space is limited

Not for

• Large or front-heavy models that need extra stability
• Armies based around 90mm deep movement trays
• Modellers who want maximum room for scenic basing