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Size Up! by Sons of Selvedge
Get the right size on the first try when shopping online.
Unlike generic size charts, Size Up! uses an AI agent that knows your body and your wardrobe. Paste any product link and get a size rec based on garments you already own and love — not guesswork. Built for shoppers of smaller, heritage brands (raw denim, Goodyear-welted boots) where fit varies wildly and sizing feels like a gamble. You can even ask the agent follow-up questions, like chatting with a knowledgeable fit specialist.
👋 Hey PH — I'm David. After 4.5 years deep in AI (prompt engineering, LLM eval, multimodal UX) on Amazon Alexa+, I set a 2026 goal: build and launch products solo, AI-assisted.
First one: Size Up! — a web app that helps you get the right size on the first try when shopping online, especially for smaller heritage brands where sizing is inconsistent.
How it works:
🧵 Size Advice & Fit Chat — paste a product link, and the agent recommends your size based on your wardrobe and body measurements. Ask follow-ups anytime.
👕 My Wardrobe — save your favorite garments with photos + measurements.
📏 My Body — save your own measurements to sharpen recommendations.
Free to try now. Would love feedback, especially from anyone who's been burned by online sizing before (raw denim and boot people, I see you 👢).
sizeup.sonsofselvedge.co
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About Size Up! by Sons of Selvedge on Product Hunt
“Get the right size on the first try when shopping online.”
Size Up! by Sons of Selvedge was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #148 on the daily leaderboard. Unlike generic size charts, Size Up! uses an AI agent that knows your body and your wardrobe. Paste any product link and get a size rec based on garments you already own and love — not guesswork. Built for shoppers of smaller, heritage brands (raw denim, Goodyear-welted boots) where fit varies wildly and sizing feels like a gamble. You can even ask the agent follow-up questions, like chatting with a knowledgeable fit specialist.
Size Up! by Sons of Selvedge was featured in Fashion (14.6k followers), E-Commerce (41.7k followers) and Beauty & Fashion (2.2k followers) on Product Hunt. Together, these topics include over 24.2k products, making this a competitive space to launch in.
Who hunted Size Up! by Sons of Selvedge?
Size Up! by Sons of Selvedge was hunted by David Giusti. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Size Up! by Sons of Selvedge stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
David Giusti