Two sizes to check, not one
Build volume is the space your model can occupy. Footprint is the space the machine needs on your desk while it runs, including a moving bed, spool and cables. Brochures lead with the first; your shelf is limited by the second.
Every number below is a manufacturer specification read on 29 October 2026, not our measurement.
| Printer | Build volume (W × D × H) | Printer body | Note |
|---|---|---|---|
| Bambu Lab A1 mini | 180 × 180 × 180 mm [1] | 347 × 315 × 365 mm, 5.5 kg [1] | Bed needs about 390 mm front-to-back travel [4] |
| Creality Ender-3 V3 SE | 220 × 220 × 250 mm [3] | Not listed; 7.3 kg net [3] | Moving bed; get clearance from the manual |
| Anycubic Kobra 3 | 250 × 250 × 260 mm [5] | Not checked | Listed as sold out on 29 Oct 2026 [5] |
| Bambu Lab A1 | 256 × 256 × 256 mm [2] | 465 × 410 × 430 mm, 8.3 kg [2] | Moving bed; larger desk needed |
| Bambu Lab P1S (enclosed) | 256 × 256 × 256 mm; slicer defaults to 250 mm height [6] | 389 × 389 × 458 mm, 12.95 kg [6] | Bed moves inside the enclosure |
Worked shelf check
A shelf is 400 mm wide and 380 mm deep. The A1 mini’s body is 347 × 315 mm, so on paper it fits with 53 mm to spare across and 65 mm front to back [1].
Now add the clearance Bambu publishes: about 390 mm for the heatbed’s travel in the Y direction [4]. The shelf is 380 mm deep, so the moving bed would overhang or hit the wall. Result: does not fit as placed. Either turn the printer so the bed travels along the 400 mm width, or use a deeper surface.
Repeat the check for any printer with a moving bed. If the manual does not give a clearance, record the gap as unresolved rather than assuming it fits.
How to size the plate you need
- List the three parts you are most likely to print first, with their size in the orientation you would print them.
- Add 10 to 20 mm on each side for a brim or supports, then compare against the plate, not the brochure headline.
- If one part is the only thing that needs a bigger printer, price splitting it into two pieces before paying for a larger machine.
- On the P1S, Bambu notes a collapsible filament-cutter stopper can take up part of the printing area when popped out [6].
What extra size costs
On Bambu’s US store on 29 October 2026 the A1 mini was $199 on sale ($219 typical) and the A1 was $259 ($299 typical): $60 to $80 for growing the plate from 180 to 256 mm on each side [1][2]. Creality’s Ender-3 V3 SE sat between them in size at 220 × 220 mm [3]. Size is the cheapest upgrade to justify with a ruler, and the easiest to overbuy for a hypothetical future project.
Package size matters on delivery day
Bambu lists the A1 mini package at 385 × 430 × 460 mm and the A1 package at 596 × 536 × 325 mm [1][2]. Keep the box until the return window closes; both Bambu and Creality require original packaging for returns. Our return-terms guide has the details.
Questions before you decide
What build volume do I need for a first 3D printer?
Measure the parts you actually plan to print and add room for a brim or supports. If they all fit inside about 150 mm, a 180 mm printer such as the A1 mini is enough; if they reach 200 mm or more, look at 220 to 256 mm plates.
How much desk space does the Bambu A1 mini need?
The body is 347 × 315 × 365 mm, but Bambu’s FAQ asks for about 390 mm of space for the heatbed to travel front to back. Plan the depth around the 390 mm figure, not the body.
Is the P1S build volume really 256 mm tall?
Bambu lists 256 × 256 × 256 mm but sets the default printable height in Bambu Studio to 250 mm to protect the heatbed, and points to a wiki article for using the remaining 6 mm.
Sources & verification
Product details and prices can change. Check the linked provider before buying.
- Bambu Lab US store: A1 mini and A1 mini Combo (prices, specifications, FAQ) Accessed 29 Oct 2026
- Bambu Lab US store: A1 and A1 Combo (prices, specifications, FAQ) Accessed 29 Oct 2026
- Creality: Ender-3 V3 SE support page and specifications Accessed 29 Oct 2026
- Bambu Lab Wiki: A1 mini FAQ Accessed 29 Oct 2026
- Anycubic store: Kobra 3 product page Accessed 29 Oct 2026
- Bambu Lab US store: P1S listing, specifications and FAQ Accessed 29 Oct 2026
Sources link directly to providers. Product buttons may use separately labeled affiliate links. Read our disclosure.