Blocking Mats and Pins
A blocking mat — typically a foam puzzle mat — provides a stable, pinnable surface for blocking finished pieces. The combination of a blocking mat, rust-proof T-pins, and (optionally) blocking wires transforms blocking from a chore into a controllable process.
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Foam puzzle mats
The standard blocking surface. Inexpensive (gym mats from a discount store work fine), pinnable, and modular. Buy at least 4 mats for full sweater blocking.
T-pins
Use rust-proof T-pins (stainless steel). Standard sewing pins rust and can stain wet wool. T-pins are easier to grip than straight pins and stay in place better.
In partnership Tools and supplies that make this technique easier.
Blocking wires
Long, thin, flexible wires threaded through the edge of a piece for even tension along straight edges. Most useful for shawls and rectangular pieces. Reduce the pin count from hundreds to dozens.
Setup
Lay the mats on a flat surface (floor, large table). Lay the wet piece in position. Pin or thread blocking wires to set the dimensions. Let dry completely (12–48 hours) before unpinning.
Abbreviation reference
| Abbreviation | Meaning |
|---|---|
| BO | bind off |
Tips
- Use rust-proof T-pins — standard pins rust and stain.
- Buy at least 4 foam mats for full sweater blocking.
- Blocking wires are worth the investment for shawls.
In depth
Blocking equipment is a one-time investment that pays back across every blocked project. The combination of foam mats, rust-proof T-pins, and blocking wires turns blocking from a precarious balancing act into a controlled, repeatable finishing process.