Shop size and sales volume are commonly assumed to be a kind of safety net. They are not a legal standard for whether permission was required in the first place. Enforcement in practice can vary, but the underlying question of whether a design was authorized to use does not change based on how many units were sold.
Crediting the original artist or source is a courteous practice in many creative communities, but it is generally not the same thing as having permission to reproduce and sell the work commercially. Credit and commercial license are two different things.
Bear Grips Pro Shops: Custom Apparel for Your Team. No Minimums. Free Shipping.There is no widely agreed, reliable percentage-change threshold ("change it by 30% and it's legally yours") that merch sellers can safely rely on. Whether a modified design still relies on someone else's protected work is a fact-specific question, not a math formula.
Parody can matter in some copyright analyses, but the standard for what actually qualifies is narrow and depends heavily on the specific facts. Slapping the word "parody" on a design, or making a joking reference to a brand, does not automatically clear it.
The single most reliable way to avoid all of the myths above is to design something original in the first place: your own logo, your own artwork, your own wording. Bear Grips Pro Shops supports unlimited design elements and colors on every product with no extra printing charge for complexity, so an original design costs no more to produce than a copied one would. See the full copyright and trademark guide for the broader practical checklist before printing any design.
Your own logo, your own artwork, unlimited colors at no extra charge. Print what is actually yours.
Start FreeNot reliably. Shop size and sales volume are not a legal standard for whether permission was required. This is a common myth, not a safe assumption.
Generally no. Credit is a courtesy in creative communities, but it is a separate thing from having actual permission or a license to reproduce and sell the work.
No reliable rule like this exists. There is no widely agreed percentage-change threshold that reliably converts someone else's protected work into a new original design.
No. This is general educational information to help merch sellers understand common misconceptions. It is not legal advice and does not promise any specific outcome. Talk to a qualified attorney for an actual design decision or dispute.