If you are interested in Saxon costume, or early period costume, you really must download this book, which is now offered for free here: http://archaeologydataservice.ac.uk/archiveDS/archiveDownload?t=arch-281-1/dissemination/pdf/RR145.pdf
This book covers textiles, textile production, clothing, embellishment, and jewelry. If you are interested in this time period, this book easily offers enough material to get you started.