The short answer is bigger than either of our printers, and the reason is that a build volume is a limit on one piece, not a limit on a part.

But the numbers matter, so here they are first.

The two build volumes

Resin, on a Formlabs Form 4: 200 × 125 × 210 mm, at layer heights from 25 to 50 microns. That is roughly a shoebox standing on end, and it is where almost everything we print lives.

Filament, on a Bambu Lab X2D: 256 × 256 × 260 mm with one nozzle running, 235.5 × 256 × 256 mm with both. More than three times the resin volume.

Measure your part in all three axes before you assume it does not fit. A part that is too tall lying down is often fine standing up, and orientation is our job anyway — we will rotate it to whatever gives the best surface and the fewest supports.

Why the resin number is not the ceiling

If a part is larger than the Form 4, we do not shrug and move you to filament. We split it, print the pieces, and bond them.

This is ordinary work, not a heroic measure. It is how architectural models get made at presentation scale, how large busts and statues get printed, and how a long thin part gets off the machine without warping. The pieces are cut at planned seams, keyed so they can only go together one way, and bonded with an adhesive the resin actually likes.

The thing worth understanding: splitting costs you detail nowhere. Every tile is printed at the same 25 microns as a small part would be. You do not trade resolution for size — a two-foot model has the same crisp edges as a 30 mm miniature, because it was printed as a set of small parts.

That is the opposite of how it works on a big filament machine, where a larger part usually means a bigger nozzle and a taller layer to finish it in reasonable time, and the surface gets coarser as the part gets bigger.

On pricing, "splitting an oversized part" sits under fixes to your model, which are included in the print price. We are not charging you extra for the privilege of your part being large.

What a seam actually looks like

Honest answer: there is one, and we will tell you where it is going before we print.

A well-placed seam lands on an edge, a panel line, a natural break in the geometry, or a face nobody sees. On a painted model it disappears under primer. On a bare, unpainted part in clear resin, you will be able to find it if you look for it.

If a visible seam is unacceptable and the part is bigger than the Form 4, that is a real constraint and it is worth a phone call rather than an order. Sometimes the answer is filament in one piece. Sometimes it is redesigning where the part comes apart so the seam becomes a feature.

When you want filament instead

One piece, no seam, and detail is not the point. A big enclosure, a jig, a bracket, a mount.
The part has to be tough. Large resin parts are stiff and comparatively brittle; a big filament part flexes.
The part is mostly volume. Material cost per cubic centimetre is simply lower. If the surface does not have to be beautiful, you should not be paying resin prices for bulk.

Filament jobs start at $19, resin at $29. SLA vs. FDM has the full comparison.

What big actually costs

Size drives price through two things, and neither is a surcharge:

Material. A part four times the size in every direction is not four times the volume, it is sixty-four times. This surprises people more than anything else about printing.
Machine time. A tall print is a long print, and a split part is several prints plus the bonding and finishing afterward.

Which is why hollowing matters. Most display parts do not need to be solid, and hollowing with proper drain holes can take a large part's material cost down enormously without any visible change. That is included too, and how to prepare a 3D file for resin printing explains how to set it up if you want to do it yourself.

Send it and find out

Send the file through the quote form — STL, OBJ, STEP, or 3MF, up to 8 MB. Large parts often mean large files; if yours is over the limit, send a shared link or call (239) 880-2698 and we will sort it out.

You will get a real number the same day, including how we would split it if it needs splitting, and where the seams would go. Standard turnaround is 4–9 days and shipping is free anywhere in the USA.

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