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.
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.
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.