FAQ.

Each ring has a 1×1 stud on top. Each tile face has a corresponding socket. You press the tile down. It clicks on. You pull, it clicks off. No glue, no tools, no learning curve. The hold force is 6 newtons, enough to survive shower, swimming, sleep. Light enough to swap in two seconds.

No. We tested 5,000+ wear cycles. Pull-off force is 6N – for context, opening a soda can takes about 14N. The tile only releases when you intentionally pry it off. We've worn the same ring daily for 8 months. Zero accidental losses.

Yes. The tiles are genuine LEGO® ABS and shrug off water, sweat, soap and sunscreen. The silver base is 925 sterling, naturally water-resistant, but we recommend drying after extended water exposure to prevent micro-tarnishing on the band.

Yes. Same 1×1 grid, same packs. When earrings land, your ring tiles will work on the earrings, and vice versa. One pack, multiple jewelry.

925 sterling silver. Cast, hand-finished, brushed matte, hallmarked at the Czech Assay Office in Prague. The stud on top is the same 925 silver, machined to the 1×1 standard.

No. The tiles are genuine LEGO® 1×1 round tiles in ABS. The silver is the foundation. The tiles are the personality. You change the tile, not the silver.

No. We're an independent Czech jewelry brand. The tiles in our packs are genuine LEGO® 1×1 round tiles that we source, curate into palettes and pack by hand in Prague. We're not affiliated with, endorsed by, or partnered with the LEGO Group.

Yes. Every pack is genuine LEGO® 1×1 round tiles, so any 1×1 round tile you already own snaps straight on. The ring grows with whatever you've got.

EU 50, 52, 54, 56, 58, 60, 62, 64. That covers ~95% of adult fingers. If you're outside this range, contact us at build@modumodu.eu and we'll quote a custom size.

Three options:

1. Print our free sizer (1-page PDF). It has a paper strip method and a circle method for measuring with a ring you already own.
2. Visit any jeweler – they'll size you in 30 seconds, free.
3. Measure an existing ring you wear: the inside diameter in mm minus 0.5 mm approximates your EU size × 1/π. Or just use option 1.

Yes, free. If the size is wrong, send it back within 30 days of delivery and we exchange it for the right size. Shipping both ways is on us.

Go with your best guess (EU 54 is the most common for women, EU 60 for men). If it's wrong, they send it back and we exchange it for the right size, free. Reply to your order confirmation with a gift note and we'll hand-write it into the box.

Yes: €50, €95 or €150, sent by email the moment you pay, valid 12 months for one order. Get one here. They enter the code at checkout under "Add promotion code".

Order a half-size up. Most people's ring fingers swell 1–2mm in heat. We'd rather you wear it loose in winter than have it stuck in July.

Warm water, mild soap, soft cloth. For tarnish on the silver band, use a silver polishing cloth (we include one in the box). Don't use ultrasonic cleaners – too aggressive for the snap mechanism.

925 sterling will develop a patina over time – that's normal. To slow it: store in the included pouch, avoid pools/spas (chlorine), don't sleep with it on. To remove patina: silver polishing cloth, light pressure, 30 seconds.

Keep them in the pack pouch they came in, away from direct sun so the colours stay bright. A small pill box works great for travel.

Worldwide. Standard service to EU, UK, US, Canada, Australia, Japan. Other destinations on request.

We ship from Prague within 7–14 days of order. Transit after dispatch: EU 3–5 business days, UK 4–6, US/Canada 6–10, Australia/Japan 8–12.

EU: free over €100, otherwise €5. UK: €8. US/Canada: €12. Australia/Japan: €18. Tracked + insured.

For US, Canada, Australia, Japan: customs may apply. We declare honest value. You're responsible for any duties. We've never had a package held up – but it's possible.

Every order ships tracked and insured. If a package is lost, we replace it for free.

14 days from delivery, unworn, original packaging. Full refund minus return shipping (EU customers: free return).

Email build@modumodu.eu with your order number. We send a return label within 24h. Take the package to any post office. Refund within 7 days of receipt.

When earrings land, they'll be subject to a 7-day return policy and must be unworn (hygiene rule). We'll inspect them on receipt. If they show wear, no refund.

Yes. Same 1×1 grid, same packs, new placement. Join the waitlist to be first.

Most packs restock. We make them as long as people want them. If a palette gets retired, we'll say so on its page – but the default is ongoing production, not finite drops.

Karlín, Prague, Czech Republic. We make everything in one workshop, with one bench, no outsourcing.

Honza Borysek (brand, design) and Jakub Linger (master jeweler, 18 years of bench work). Two guys, one workshop.

Not currently. If we expand, we'll announce on Instagram first.

build@modumodu.eu with "PRESS" in the subject line. We have a press kit with high-res photos, brand description, founder quotes ready to send.