Can You Sell Sesame Street & Elmo Fan Art on Etsy? The 'If I Change It 30%, It's Legally Mine' Myth

There is a rule that gets repeated in every Etsy Facebook group, every Discord for print-on-demand sellers, and half the "how to sell fan art legally" videos on YouTube. It goes like this: if you change a design by 30% (or 20%, or "seven things"), it stops being a copy and becomes your own original work. So you can take Elmo, tweak the shade of red, round off the eyes, give him a slightly different nose, and now it's a "red monster of your own creation" that you can sell all day.

It is one of the most confidently repeated ideas in the whole marketplace. It is also completely made up. There is no 30% rule anywhere in US copyright or trademark law, and building a Sesame Street shop on it is how sellers end up with a removed listing and a strike they didn't see coming.

Here's what the law actually looks at, why a "changed" Elmo is often in worse legal shape than an exact copy, and where the genuine safe lane is.

The short answer

You cannot sell fan art of Elmo, Cookie Monster, Big Bird, or any other Sesame Street character on Etsy without a license — and changing the artwork by some percentage does not fix that. Copyright infringement is measured by substantial similarity, not by how much you altered. On top of the copyright, the names themselves — ELMO, COOKIE MONSTER, SESAME STREET — are registered trademarks, so a redrawn character listed under those words infringes even if the picture is different. The only genuinely safe version is art that shares none of a specific character's protected, recognizable elements and names none of them anywhere in your listing.

There is no percentage rule — that's not a loophole anyone forgot to close

The "30% rule" is a genuine urban legend of intellectual property law, and IP attorneys write the same debunking article about it every year because it will not die. There is no threshold — not 30%, not 51%, not "seven changes" — that converts a copy into an original. Copyright infringement does not hinge on a percentage of difference between two works at all.

What courts actually apply is the substantial similarity test: would an ordinary observer, looking at your piece, recognize that it was taken from the original? If an average person glances at your "red monster" and immediately thinks that's Elmo, you have substantial similarity, and it does not matter that you changed the hue or moved the pupils. The recognizable, protected expression is still there. That's the whole test — recognition, not arithmetic.

The myth almost certainly grew out of a garbled memory of fair use, the doctrine that sometimes allows limited unlicensed use of a copyrighted work. But fair use is a four-factor balancing test decided case by case, and none of the four factors is "did you change 30%." People heard "sometimes you can use part of a work" and mutated it into a tidy number that feels safe to repeat. It isn't a rule. It's a rumor wearing a percentage as a costume.

Modifying a character is exactly the right the copyright owner controls

Here's the part that makes the myth backfire. Under 17 U.S.C. § 106(2), the copyright owner holds the exclusive right to prepare derivative works — new works based on the original. A recolored, restyled, "30% different" Elmo is the textbook definition of a derivative work. So when you modify the character, you are not stepping outside the owner's rights. You are stepping directly onto the one right — the derivative-works right — that is theirs alone to grant.

Two real cases show how far this goes.

In Rogers v. Koons, 960 F.2d 301 (2d Cir. 1992), the artist Jeff Koons took a photographer's black-and-white photo of puppies and turned it into a large color sculpture. He changed the medium entirely — from a 2D photograph to a 3D carved sculpture — made the puppies blue, exaggerated their noses, and added flowers to the couple's hair. If any amount of change could launder a copy, that would be it. The court still found infringement, because Koons had copied the original expression, not just the idea. Changing the medium and the colors did not save him.

The lesson from Koons: he changed vastly more than 30% — he changed the entire physical form of the work — and still lost. "How much did you change it" was never the question. "Is the original's expression still recognizable in yours" was.

The second case is worse news for the "now it's mine" half of the myth. In Anderson v. Stallone (C.D. Cal. 1989), a writer produced a detailed treatment for a Rocky sequel using Stallone's characters without permission. The court held that because his treatment was an unauthorized derivative work, no part of it received copyright protection at all. Think about what that means for a modified Elmo: not only is your changed version still infringing, you also can't claim ownership of the "new" bits you added, because the whole thing is built on a character you had no right to adapt. It's the worst of both worlds — you carry all the infringement risk and get none of the ownership you thought you were buying with those changes.

The trademark layer bites on the name, no matter how you draw it

Even in the fantasy where your artwork was somehow different enough to dodge copyright, you are not clear, because Sesame Street's characters are also registered trademarks owned by Sesame Workshop. ELMO, COOKIE MONSTER, BIG BIRD, and SESAME STREET are protected as brand names for exactly the kinds of goods sellers make — plush, apparel, stickers, prints, party supplies.

Trademark infringement turns on likelihood of confusion: would a shopper think your item is officially connected to, or licensed by, Sesame Street? The moment you type "Elmo" into your title, your tags, or your description, you have used the mark to describe your goods, and a red furry monster sold as an "Elmo birthday shirt" reads as official merchandise to an ordinary buyer. The drawing being 30% different does nothing here — the word is doing the infringing.

And Sesame Workshop does enforce. In 2018 the nonprofit sued STX Productions in federal court over the R-rated puppet film The Happytime Murders and its tagline "No Sesame. All Street." Sesame Workshop actually lost that fight — the judge found the tagline was a pithy, distinguishing joke and denied the restraining order, and Sesame dropped the case. That loss is worth understanding honestly, because it draws the line precisely: a clever tagline that comments on and distinguishes itself from the brand can survive, but a plush or print that uses the actual character as the selling point is the opposite — it trades on the character rather than commenting on it. One is arguably protected expression. The other is merchandise.

Redrawing "from scratch" doesn't help either

A common follow-on belief is that if you draw the character entirely by hand rather than tracing an official image, it becomes yours. It doesn't. Characters with distinctive, well-delineated traits are protected as characters, independent of any single drawing. Elmo isn't protected as one specific PNG — he's protected as a character defined by consistent, recognizable elements. Reproduce those elements from memory, from a hand sketch, or with a fresh art style, and you have still reproduced the protected character. The pencil in your hand doesn't change the analysis.

Where the real safe lane is

The line copyright draws is between an idea (free for everyone) and the specific expression of it (owned). You are completely free to make and sell:

A generic red monster, a cheerful cookie-loving creature, or a big friendly bird — as long as it shares none of a specific Sesame Street character's protected, recognizable elements and doesn't invite the "that's Elmo" reaction from an ordinary viewer. Original characters and original monster art are their own thriving Etsy category. The safe version isn't "Elmo minus 30%" — it's a design that never started from Elmo in the first place.

And critically, name none of it after the brand. Do not put "Elmo," "Cookie Monster," "Sesame Street," or the character names in your title, your tags, or your description. This last point trips up sellers who think a laundered, generic-sounding title protects them. It doesn't, because a compliance scan — and a rights holder's search — reads the whole listing. A title that says "Red Furry Monster Birthday Sticker" paired with tags like elmo, sesame street, elmo party is not disguised; the mismatch between a generic title and brand-name tags is itself the tell. The tags and the description are where sellers quietly confess, and they get scanned right alongside the title.

The bottom line

The 30% rule feels like a loophole because it gives you a number to hide behind, and numbers feel safe. But copyright asks whether your work is recognizable as the original, not whether you hit some quota of changes — and the derivative-works right means the more you modify a protected character, the more squarely you land on a right that belongs to its owner. Add the trademark in the character's name, and a "changed" Elmo is exposed on two fronts at once.

If you want to sell in this space, the durable move is to build genuinely original characters you own outright, or to get a license. Everything in between — the tweaked, recolored, "different enough" version — carries the full risk of the copy with none of the protection you thought the changes bought you.

For more on where the line falls, see our deeper guide to selling fan art and derivative works on Etsy, why "inspired by" a brand is rarely as safe as it sounds, and — if a listing has already been pulled — whether you can modify and relist it safely. You can also check exactly which characters and brands are protected on our Sesame Street trademark guide.