# Printing a custom box with the 3D Print Box Generator > hollow boxes with optional lids, engraved text, and rounded corners This is the fastest way to get a purpose-sized container without opening CAD. You give it the internal cavity you need, it builds the box around it: walls, floor, rounded corners, and optionally a fitted lid with a press-in stopper so the top stays put. Because dimensions are internal, sizing a box around a specific object is a one-step job. It also does personalization properly. Text and symbols are real geometry on the front face or lid, in your choice of font, so a labeled storage box or a gift box with a name prints in one go on a multi-color machine or stands out as relief on a single-color one. ## What you need - Any FDM 3D printer; the box prints flat with no supports - PLA or PETG filament; PETG if the box will live somewhere warm like a car - A second filament color if you want contrasting text on a multi-material printer - Calipers if you are sizing the cavity around a real object ## Step 1 - Size the cavity Open the tool and set **Units**, then **Width**, **Depth**, and **Height** as internal measurements. Add about 0.5-1 mm of clearance over the object you are storing. Set **Wall Thickness** (2-2.5 mm is sturdy for most boxes) and use **Corner Radius** to round the footprint; the tool shows the resulting outer size as you go. ## Step 2 - Lid, text, and texture - **Lid Style:** **No Lid** for an open bin, **Closed** for a sealed display piece, or **With Lid** for a removable cap. With a lid selected, enable the **Lid Stopper** and tune **Stopper Depth** and **Stopper Size** to control how firmly the lid clicks on; around 90-95 percent stopper size gives a satisfying snap fit in PLA. - **Text:** toggle text on, type your label, and pick a font. **Connect Text** merges script letters into one continuous shape. Add a **Symbol** before, after, or on both sides of the text, scale it with Symbol Size, and place everything with Text Size plus X and Y offsets. The **Text Side** option targets the Front, the Lid, or Both. - **Wall Fill Pattern:** enable the line texture to wrap the outer walls in a subtle engraved line pattern, which hides layer lines and adds grip. ## Step 3 - Export Download **3MF** (preferred, carries color separation for the text) or **STL**. The box and lid export together, positioned for printing. ## 3D Printing ### Slice and print 1. Open the 3MF in your slicer. On multi-color printers the text imports as a separate object you can assign to a second filament. 2. Print at 0.2 mm layers with 2-3 perimeters; the generated wall thickness already provides the strength, so 10-15 percent infill is plenty. 3. No supports needed: the box prints open-side up and the lid prints flat. 4. Test the lid fit before printing a fleet. If it is too tight, increase Stopper Size toward 100 percent (looser) or scale the lid up 0.5 percent in the slicer. 5. For a gift box finish, print the body in a matte filament and the lid in silk; the contrast looks deliberate and premium. ## Make it yours - Print a labeled box per board game for sorting tokens, with the game name on the lid. - Make a matching set of bathroom canisters in graduated sizes with the same font and corner radius. - Use a heart symbol with a name on the lid for a small jewelry gift box. - Size the cavity around a deck of cards plus 1 mm for a snap-lid deck box. - Generous corner radius plus the line wall texture makes a great modern desk planter (skip the lid). - Emboss 'SOS' or 'First Aid' on a sealed-lid box for a glovebox emergency kit. - Want compartments inside? Jump to the 3D Print Grid Box Generator, the sibling tool with rows and columns of dividers. --- Open the 3D Print Box Generator: https://www.mylasertools.com/3d-box-generator Read online: https://www.mylasertools.com/learn/guides/3d-box-generator