Making bag bases with the Crochet Base Generator

Difficulty: easy. Time: 10 minutes to design, minutes to cut. Methods: laser cutting or 3D printing.

A rigid base transforms a crochet bag: it holds the shape, protects the stitches from the ground, and gives the first round a perfectly even foundation. The tricky part is the holes, because crochet needs them evenly spaced around the entire perimeter, and any drift accumulates into a visibly crooked first round. This generator spaces holes at exact equal intervals around the outline, whatever the shape.

Six shapes cover the standard projects: Circle / Oval, Square / Rectangle, Triangle, Quarter Circle, Hexagon, and Octagon, which handles bag bases, basket bottoms, and shawl or cardigan panels.

Open the Crochet Base Generator

What You'll Need

Laser: 3 mm laser-grade plywood for natural baskets, or acrylic for wipeable, structured bag bases
3D printing: any FDM printer; PETG flexes a little more forgivingly than PLA in a soft bag
Your yarn and hook, to check that the hook actually passes through your chosen hole size

Step 1 - Shape and size

Open the tool, set your Units, and pick a Base Shape. Size it with the dimension controls (plus Corner Radius on rectangles, so corner holes do not crowd). An oval around 280 x 120 mm is the classic market-bag base; a 150 mm hexagon suits a small basket.

Step 2 - Tune the holes

Hole Diameter: match your hook and yarn weight. 5-6 mm suits worsted yarn with a 4-5 mm hook; chunky yarn wants 7-8 mm.
Hole Spacing (target, center-to-center): the tool treats this as a target and rounds to a whole number of holes so spacing is exactly even all the way around, with no awkward remainder gap where the loop closes.
Edge Clearance: how far holes sit from the outline. Keep at least 3 mm of solid material so stitches under tension cannot tear out a hole.
Count matters for pattern math: if your stitch pattern repeats in multiples of 4, nudge the spacing until the rounded hole count lands on a multiple of 4.

Step 3 - Export

Download SVG for laser cutting, or set the extrusion Height and download STL/3MF for printing.

Choose Your Build Method

Cut and finish

Cut the base in one pass; holes and outline are all cut lines.
Lightly sand both faces and every hole edge. Yarn snags on char and rough edges, so a 30-second once-over saves the project.
Seal plywood bases with a clear matte spray so the base survives damp ground and the char never transfers to light yarn.
Single crochet into each hole for round one, then continue the bag pattern as normal.
Acrylic bases need no sealing and wipe clean; flame-polish the edge if you want it glossy.

Make It Yours

Oval base plus jute yarn makes the classic market tote everyone asks about.
Hexagon bases in three sizes for a nesting basket set.
Engrave a maker's mark or recipient's name in the center of the base before cutting; it becomes the bag's hidden signature.
Quarter circle panels are made for shawl yokes and fan-shaped clutch flaps.
Triangle bases joined edge to edge create faceted geometric baskets.
Sell base multipacks: same shape, three hole gauges for different yarn weights.
Clear acrylic base on a brightly lined bag lets the lining color show through the stitches.

Open the Crochet Base Generator

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