Mr. Pen- Interlocking Blocking Mats, 12”x12”, 4 Pack, Blocking Mats for Knitting & Crochet Projects with 50 T-Pins, Knitting Blocking Mats and Pins, Crochet Blocking Board for Crocheting, BMFK04M212

Brilliant size for blocking an adult jumper, good quality with pins included

Nice. Interlocks nicely. Came with a "thank you" from seller. Nice touch. Great for small projects. Will recommend and buy from seller again.

Really happy with these blocking mats! Does the job, comes with lots of pins and is a nice sturdy mat. I've blocked a few of my crochet tapestries on them with no issues. Would recommend

Be careful to remember the envelope contains pins before ramming your fingers in there. Having one an inch up your nail bed is not fun! 4 stars as I do prefer the solid type as you can fit more squares on at once and I did have to double up on the foam squares to get a solid grip.

Fast service, great product ordered extra set so they can be used on larger projects. Highly recommend

Really great blocking mats for smaller projects, comes with useful pins.

Works well when pressing knitting

Great purchase. Have never used blocking boards before but will do on all my future knitting projects. Also came with pins which was very helpful.