This one is about 24x27, I think. I didn't do the cm to inches math to know for sure.
By Educa, and the box says it originally came with glue and a box stand to hold the lid while you worked. It also had an offer to replace and lost pieces for free - it's a company in Spain, I think. Wish American companies did that! This was a yard-sale purchase. It will be going on eBay after my Mum works it.