Please don't use craft store rings or any other type not intended for use as a component of a baby carrier!
Using a copyrighted pattern and making products to resell is copyright infringement. It is illegal to manufacture products from copyrighted patterns with the purpose to resell them. This unfortunately does affect the business of the designer who makes the pattern available in the first place and also the integrity of the style when it is reproduced and sold made of possible inadequate fabrics or methods that have not been properly tested. UpMama would love to help out the do-it-your-selfers make a fun hybrid sling, we only ask that you respect the effort that went into creating this design and not resell it or any variation of it based on our pattern. Making a hybrid for personal use or as a gift is perfectly fine! Have fun and do let me know if you have any questions and I'll be happy to help if I can! I'm sorry but exact measurements for pouch variations are unavailable for these public instructions, I hope you understand.