Olikraft 5-Inch Granny Square Wooden Crochet Blocking Board with 15 Stainless Steel Pins & Stand - Premium Knitting & Crochet Kit for Perfect Blocking - Best Gift for Crocheters & Knitters - Perfect for Shawls, Blankets & Doilies

This board is of good quality, and I like the 14" size. If you're going to get a blocking board, I would have no hesitation recommending this one, and I'd suggest getting the largest size you're able to. You can block small squares on a big board, but can't block big squares on a small board.I'd never used a blocking board before this one. Some aspects of using one, though obvious in hindsight, were unexpected. The main issue is that stacking multiple squares on the same set of pins relies on the squares having a pretty good amount of tension to keep them from slipping down the pins. That's actually probably pretty achievable in most cases, but it assumes that your squares are all constructed in pretty much the same way, and that you can adjust the pins to be a larger square if you're not getting enough tension to keep them from sliding.The project that I'm working on is more of a sampler afghan. I've got 32 squares made with 16 different patterns. A lot of the patterns came from the same crochet-along, but I got some patterns from elsewhere or even just found interesting stitches and made blocks with them. The result is that I've got a wide variety of degrees of tension when blocking them into 10" squares. Since they're all so different from each other, some are just barely big enough to block to 10" and others have slack to spare. I can't change the size that I'm blocking them to, because a different size wouldn't work for all of the different patterns.The yarn is 100% wool, and I'm wet blocking them, and their elasticity when wet is substantial. The result is that many of them do not stay taut on the pins. (The set of squares that were on the board when I went to take photos are actually the most "evenly taut" out of the six batches I've done so far, and they still have some sag to them.) I ended up using quilting clips as spacers on several pins, just to try to keep some air flow between the squares. It's not a perfect solution, but it's what I had on hand. What I'd really like is some kind of rigid plastic mesh that I could slide down over the pins between squares to provide support for the squares while maintaining air flow, with proper spacers at the corners to support the mesh.The other issue I've come across is that it's very easy to knock a pin loose while pulling a stitch onto a neighboring pin. It's mostly just an annoyance, and would probably be less of an annoyance with smaller squares, where it would be easier to make sure I was putting the pin back in the right hole when fixing it.The next project I plan to use it with will have 380 squares made with acrylic yarn and 3.5" across. I plan to steam block them on the pins and cross my fingers that the steam won't ruin the board. I am optimistic that since they will all be constructed the same way as each other, and the yarn won't be so elastic, and I'll be able to achieve better tension across the pins. And with 380 squares to block, I'll be very glad that I can fit at least 16 of them on the board at once.