This sub is fine: there are fashion historians here. You might consider x-posting to /r/fashionhistory too

This is a pretty academic sub, so I'm throwing archaeological & documentary resources at you. If you want me to brain-dump higher level overview, let me know. Or if you're fine with very-not-academic sources, I can point you at some reenactor / living history type folks who read the academic stuff and then geek out in more accessible language.

Sources I've cited on the book reports I attach to my historical clothing (or otherwise used even if I didn't write a report) have included:

• Die Textilfunde aus dem Hafen vom Haithabu by Inga Hägg, on 10th century clothing fragments found in a Danish harbor
• Die Textilfunde aus der Siedlung und aus den Gräbern von Haithabu same author, same place/time, but the graveyard
• Moda a Firenze: lo Stile di Eleonora di Toledo and Moda a Firenze: lo Stile di Cosimo de Medici by Roberta Orsi-Landini, on mid-16th century Florentine clothing
• Patterns of Fashion (3 & 4) by Janet Arnold. 3 covers visible clothing layers, and 4 is the underwear edition. That's 16th and 17th century. Explores extant garments and gives patterns(-ish) for them
• Queen Elizabeth's Wardrobe Unlock'd by Janet Arnold
• Shoes and Pattens: Finds from Medieval Excavations in London
• Woven into the Earth: Textile finds in Norse Greenland by Else Østergård, on 14th century clothing (very well-preserved!)
• Drei Schnittbucher: Three Austrian Master Tailor Books of the 16th Century by Katherine Barich, Marion McNealy. 3 Austrian tailor manuals are presented in facsimile form, plus transliteration and translation of every page, plus computer rendered drawings of the cutting diagrams (because the original pages are kind of degraded)
• Dressing Renaissance Florence by Carole Collier Frick. Goes into clothing and sumptuary laws of 15th century Florence
• L'abito della Granduchessa - misnamed, because the dress belonged to her lady in waiting, not to her, but about the red dress of Pisa

Drea Leed has generously created Queen Elizabeth's Wardrobe Upload'd

Still pretty academic just not published, Hilde Thunem has pages on Viking clothing where she has translated portions of Inga Hägg's work, pulled in info from other archaeologists, and shown how other experimental archaeologists have interpreted this all to go together.

Less academic and more "how to" would be:

• The Tudor Tailor
• The Tudor Child (more research heavy after readers clamored for it after the first one)

There's also Medieval Garments Reconstructed: Norse Clothing Patterns which was a collaboration with the Woven into the Earth author and several others to turn those archaeological finds into patterns.

The proceedings of the Northern European Symposium on Archaeological Textiles (NESAT) might have something useful for you, but I only have a copy from year ten, and I was more focused on "ohh moment of inertia of spindle whirls?!"

For primary sources, there's Juan de Alcega's tailor manual from 16th century Spain and several extant pieces of clothing (that come to mind immediately: the red dress of Pisa, the burial clothes of Eleonora/Cosimo/don Garcia, St Clare's dress, the Sture garments...)

Everything here's on Europe, but I was kind of guessing that's what you were looking for.

Note that the ones with German titles are in German. The Moda a Firenze books are bilingual English and Italian. Some of these are either as expensive as a textbook or will involve a trip to the Library of Congress for Americans (since all the other library copies are in Europe, and most of these are out of print).

Also: pictoral evidence! Paintings are not photographs, but they can be handy hints. And when you run into a Middle English word for a garment in Queen Elizabeth's inventories (for example), the OED can help track down old meanings.