My Etsy shop comprises entirely of digital downloads, nothing physical. I have 704 items in the following categories - Clipart Bundles, Junk Journal Cards, Cutting Board PNG Files, Junk Journal Kits, Junk Journal Pages, Junk Journal Tags, Mug Wraps, Sublimation Bundles (packs of t-shirt designs), Single Sublimation Designs, and Tumbler Wraps.
I have also tried Folding Fans, Greeting Cards, Kitchen Towels, Laser Tumblers, and Mouse Pads, but these haven't been successful.
As you can gather, all these products are art/design-based, as opposed to printable planners, budgeting tools, calendars, habit trackers, invitations, event sets, wedding signage, etc.
Start by imagining your ideal customer, and design one set of products for them, in different styles/variations. For example:
The “Trying, Not Perfect” Adult
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Life stage: 25–45, works full-time, shops online, owns a reusable cup but forgets it half the time.
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Pain: eco-overwhelm, guilt, decision fatigue.
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Buys first: ink-friendly habit checklists, weekly low-waste swaps, and meal-planning with leftovers.
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Why they pay: tiny wins that fit in a busy week.
And start with a Greener Kitchen Starter Kit:
Leftovers flowcharts, weekly meal planners, shopping lists with swaps, fridge/freezer labels, compost quick guides, etc
Then scale out to different products. But remember, it's all about volume - be prepared to list a lot of items initially.