This lightweight and portable birch loom is made of 1/8" birch wood, and measures approximately 6" x 7 1/2" with a work area of 5" x 6 1/4". It is set up for a warp of 8 ends per inch (e.p.i.) but every other prong can be warped instead for a 4 e.p.i. The coaster size can be a max of 5" x 6 1/4". The materials for these looms are sourced in Houston, Texas and the looms are handmade in our Houston studio. The loom comes with color photo instructions, wood tapestry needle, small metal tapestry needle for the smaller and tighter areas of the project and a reusable cotton carrying bag. This is a great way to use up yarn, ribbon or fabric stash. Guidelines: • Warp requires 17 yards of any weight or thickness (as long as it fits in the grooves) yarn, string, fabric strip or ribbon. This amount takes into consideration wrapping the warp entirely around the front and back around every slot. • Weft requires about 14 yards of worsted weight yarn. Weft requirements will change with different weights or types of yarn. • Weft requirements will vary depending on the width and/or thickness of material used.