This square twining loom is 18" from corner peg to corner peg measuring across or down. The pegs are oak dowels that extend out 1-1/2" and are 1" apart.
As you fill in the weft from each end to the middle, you can switch which end is up by pivoting the frame on the stand. The bottom is now the top but facing away from you. Then, turn the stand and frame around, and resume twining downwards.
The boards are pine finished with linseed oil, but could be oak as a custom order. The loom is shipped disassembled but is easy to put together. It travels well with just the two stand pieces taken off.