Watermark Placement and Size for Marketplace Photos

Published 25 October 2026 · by Tekiba

First, whether the site allows a mark

Placement only matters where a mark is welcome. On the pages we read, the answer varies a lot, and each site has its own article here:

We read Etsy's, Mercari's and Vinted's pages again on the publication date above. Etsy's How to Protect Listing Images says:

While some sellers use watermarks, we generally wouldn’t recommend them. Using watermarks makes photos unsuitable for features within Etsy (like Etsy Finds emails), and ineligible for off-site advertising programs like Google Shopping.

Mercari's Prohibited Conduct page lists "Using watermarks, symbols or other representation that you are a preferred seller or trusted user or any other statement not specifically curated by Mercari". If a site is undecided or silent, the rest of this page applies; if it says no, upload clean copies there and keep the marked set for the places that welcome it.

Where to put it

A watermark on a photo you sell has two jobs that pull against each other: it should be awkward to remove, and it should not hide what the buyer is paying for. Four things decide where it goes.

• Corners are the easiest to crop. Someone who wants your photo without the mark only has to trim a strip off one edge, and the item survives untouched. A mark pulled in from the edge, or moved to the middle of the bottom edge, takes a bigger crop to lose.
• Close to the item is harder to crop than far from it. The nearer the mark sits to the item, the less room there is to trim it away without trimming the item too. A mark in empty space beside the item can still go with a crop of that side, so before you settle on a place, picture trimming each of the four edges in turn and check whether the mark goes before the item does.
• Never over the details. Buyers look for flaws, labels, size tags and serial plates, and some sites ask for them. Vinted's catalog rules, for one, say: "We also recommend showing any defects, scratches, wear, etc." A mark across those reads as hiding something, whatever you meant by it.
• Plain backgrounds are the easiest to paint over. A mark on an even white sweep can be filled in with the background colour in seconds. Over a textured surface it takes more work to remove, but it also competes more with the item, so keep it small there.

If a site crops your photo to a square or another shape for its grid, the edges are the first thing to go, along with any mark on them. Put the mark where the crop will not reach, or give the photo the site's shape before you mark it.

How large to make it

Most people see a listing photo small first: in search results, in a grid, on a phone. A mark sized to look discreet on the full photo may be a smudge at that size. In SignetDrop a text mark's size is a share of the photo's width, 6% by default, so the letters keep the same proportion whatever the photo's pixel size, and shrink in step with it when a site shows it smaller. A logo's width works the same way, 20% of the photo by default.

• Judge it small. Look at the preview zoomed out, or at one exported photo on your phone, and check the name is still readable.
• Opacity before size. The default text opacity is 55%. A mark that feels too loud is usually better made fainter than smaller, because small letters blur first when a site compresses the photo.
• Mixed shapes. Because the size follows the width, a mark on an upright photo is smaller next to the picture as a whole than the same mark on a landscape one. If a batch mixes both and the difference bothers you, run the upright photos as a second batch with a larger size.
• Repeating the mark across the whole photo is the hardest to crop out, and also the hardest to look past. For proofs and previews it can make sense; for photos meant to sell an item, it covers the item.

Same place on every photo, or different?

A batch tool puts the mark in the same place on every photo, and it is fair to ask whether that makes the mark easier to strip. Google researchers studied this in "On the Effectiveness of Visible Watermarks" (CVPR 2017). Their write-up on Google's research blog explains that a mark repeated consistently across many images can be estimated from the collection and removed. It also says what did and did not help:

We found for example that simply changing the watermark’s position randomly per image does not prevent removing the watermark, nor do small random changes in the watermark’s opacity.

What did help was warping the mark slightly on each image, which SignetDrop does not do. The write-up adds that larger shifts or other random elements "may lead to an even better protection". So, by that study, moving a mark at random on each photo would not on its own have stopped the method it tested, and one position across a batch is the tidier choice, not a stronger one. The same write-up says the method's estimates become very accurate "already from hundreds of images", which is a stock library's scale rather than a few listings'. A visible watermark is a label, not a lock.

One position for a whole batch

1. Add the photos to SignetDrop. They are read in the page and never uploaded. The preview shows the first photo as the batch will write it.

2. Write the mark. Under Watermark, keep Text ticked and type your shop or user name, or tick Logo image (PNG) and choose a file. A text mark and a logo together are part of the paid version.

3. Place it. Pick one of the nine places under Position, or drag the mark on the preview. Margin sets how far in from the edge it sits, as a share of the short edge, 4% by default; the + and − keys change it while the preview is focused.

4. Size it. Set Size and Opacity, then check the preview at a small size as above. Leave Repeat across the whole photo off for listing photos.

5. Download the ZIP. Every photo gets the mark in the same place, at the same share of its width. By default the copies carry none of the original's EXIF, so no GPS position goes with them either.

If you sell on a site that refuses marks as well, run the same photos a second time with both Text and Logo image (PNG) unticked, and check the preview shows no mark, for a clean set.

What this does not do

A watermark discourages copying; it does not prevent it, and anyone determined can crop or paint over one. It cannot change a marketplace's rules, and whether a marked photo is accepted is for each marketplace to decide, not us. Output above 2048px and larger batches are in the paid version, $29 once, with the full split on the pricing panel, and SignetDrop never writes its own name onto your photos.

Questions