When it comes to our denim we definitely know what a skinny or straight leg looks like. It's when we head into the boyfriend, girlfriend, and mom jeans territory that sometimes trips us up. We found ourselves wondering what exactly are the differences in the styles and how does each pair fit?

If you paused on that last part, we can help. We're breaking down what makes the boyfriend jean, the girlfriend jean, and the mom jean so special. After all, these three styles were all major trends, but now we simply count them as staples. Read on to refresh your denim knowledge [1], then shop your favourite pair to try with new and unexpected outfit ideas [2].

The Boyfriend Jean

The boyfriend jean can be traced back to Marilyn Monroe, who wore a loose-fitting pair back in the '60s. Since then, the denim has become synonymous with a slouchy and baggy feel. This relaxed look is the opposite of the skinny jean, which tapers closer to your body and has a tighter fit. The trick to making this denim style work for your body shape is all about the fit. If you're petite, go for the slim-cut boyfriend jean and if you're more curvy, opt for a tapered or skinny leg version to cut down the extra bulk.

What to look out for: Relaxed fit, baggy shape, and should look a bit big on the wearer.

The Girlfriend Jean

The girlfriend jean is you guessed it: the more feminine version of the boyfriend jean [3]. "It's a more classic fit – tighter and higher on the hip, with a tapered slim straight leg. Made from more ridged denim, the style is more authentic and offers a flattering shape," said Topshop jeans buyer Keda Rich. While the boyfriend jean can be too baggy for your frame, the girlfriend fits just right and is our personal favourite.

What to look out for: Slim fit throughout the legs, tight fit on the hips, and little to no slouch.

The Mom Jean

If you raided your mom's closet in the '90s, you most likely came out with a pair of the "mom jeans." Though the style has a stigma with being unflattering and unfashionable, contemporary brands have brought them back in full force – offering destroyed washes and cropped options. When it comes to the qualities of what makes a mom jean, the style is usually high waist, making your bum appear longer and flatter, and the zipper area has a relaxed fit.

What to look out for: High waist, long back pockets, and baggy fit around the zipper and leg area.