Your picture has maybe three different kinds of marigolds in it. Looks like there's a single orange, and a couple of doubles there.
There are dozens of different varieties of marigolds in a range of colors from creamy white, all shades of yellow and gold and orange, plus dark red and combinations, too. Some top out at 10in. high and others grow to 3ft or so. How tall are/were these plants? Here's a link to a seed supplier that has 25 varieties pictured.
This might be the best way for you to match your particular flower - shop the online seed catalogs until you see a similar picture then match the height of your plants to it.