

The real blank at this size, folded by the same engine as the studio. The artwork is a sample from a fictional brand — swap in your own in the editor.
Round-flap slit envelope dieline
Semicircular cover tucked through a curved slit in the back. A ready-sized preset of the seam-lock wallet envelope — change the length, width and height and every panel, tuck and glue flap is redrawn to match.

Sign in to download. Dieline downloads are part of Pro: PDF, Illustrator, SVG and DXF, cut, crease and bleed on separate layers, without a watermark. See plans
- Reference
- DM-SEAM-WALLET-01
- Inside size
- Width 100 · Height 200 mm
- Size range
- Width 50–350 · Height 60–400 mm
- Manufacturing
- 100 × 200 mm score to score · inside vs outside sizes
- Parts
- One blank
- Board area
- 0.046 m² · about 9 up on a 720 × 1020 mm sheet
- Default board
- SBS white board 350 g · 0.5 mm caliper
- Board options
- SBS 350SBS 300Kraft 350FBB 400GD2 350Paper 170SBS 18 pt
- Good for
The flat dieline
Exactly what the downloads contain, drawn from the template at its default size, with a 3 mm bleed. How to read a dieline.
- Crease
- Cut
- Glue area
- Bleed 3 mm

How the blank is sized
Score-to-score panel sizes of this DM-SEAM-WALLET-01 blank at the default size, with the formula each one follows. L, W and H are the inside dimensions; T is the board caliper (0.5 mm for SBS white board 350 g). Change the size or board in the editor and every panel is recalculated.
| Panel | Size (mm) | Formula |
|---|---|---|
| Front | 100 × 200 | L × H |
| Back | 100 × 200 | L × H |
| Side seam flap | 8 × 200 | – × H |
| Bottom flap | 100 × 8 | L × – |
| Cover | 100 × 50 | L × – |
Adjustable in the editor
Beyond the size and board, this structure exposes 7 options; the template and 3D preview follow each change.
- Cover shape3 options
- Cover depthmm
- Shouldermm
- Lobe / tongue widthmm
- Tuck depthmm
- Slit3 options
- Back edge3 options
The seam-lock wallet envelope family
The same structure with sizes, boards and options set for a use.

Preset
Preset
Preset
Preset
Similar structures
Other structures built in a similar way, matched on code family, category, closures and proportions.
Make this round-flap slit envelope yours
Open it in the editor to set your size, drop artwork on each face, check bleed and safe areas, and export print-ready PDF with the dieline on its own layer — or stage it in a 3D scene for a mockup.





