Marc Jacobs' penchant for unapologetic, bold and rule-breaking beauty sets the standard and repeatedly informs the biggest trends to come out of each season.

Meaning, what Marc sends down the runway has a very good chance of ending up on your face in some incarnation. So start sharpening up on your eyeliner skills now, because it looks like oversized, elongated and defiantly dramatic liner is high on the agenda for SS18 (*insert jumping for joy meme here*).

Marc Jacobs SS18 Backstage Beauty Eyelinerpinterest
Joely Walker

It gets better. In keeping with last year's bespoke beauty offering that focused on individuality first and foremost, make-up artist Diane Kendal created eight different eyeliner looks to suit every single eye shape and size.

'No two eyes are the same so we're really looking at each girl and creating a completely customised liner,' Diane told us backstage. This meant tweaking length of flicks, thickness of the lower lash line and placement of liner on the lids.

Marc Jacobs SS18 Backstage Beauty Eyelinerpinterest
Joely Walker

As the casting was still happening only hours (!) before the show, quick decisions had to be made as to which style each model would sport down the runway. When they entered backstage, each model was taken straight to Diane where with one expert glance she'd decide on exactly the right eyeliner for them and her make-up team got to work creating it.

Marc Jacobs SS18 Backstage Beauty Eyelinerpinterest
Joely Walker

For Taylor Hill, this meant getting eyeliner look number one – a thin, elongated flick with a sharp point on the inner corner. For Winnie Harlow it was eyeliner look number three – an emphasised wing with a layer of thicker liner right up to the crease of the eyelids.

Marc Jacobs SS18 Backstage Beauty Eyelinerpinterest
Joely Walker

We know what you're thinking; it's all well and good when you've got one of the world's finest make-up artists choosing your shape for you, but what about when you're left to your own devices? We asked Diane Kendal that very question. Here are her top tips for finding your finer liner.

Round eyes: Follow the natural curve of your eye and go thicker with the liner underneath the lower lash line and on the outer corner to elongate your eyes.

Almond eyes: You can do both the inner and outer points. Go thinner underneath the lower lash line and taper your flick upwards.

Close set eyes: Opt for a rounded inner corner and elongate the flicks to make the eyes appear wider.

Small eyelids: Keep your lines thinner and focus more on the lower lash line.

Flat eyelids: Opt for a super straight line on the upper lash line rather than curved.

All eyes: Don't take your flicks beyond the eyebrow.

Marc Jacobs SS18pinterest
Rex

You could be the most skilled winger in the world but if you've got the wrong tools for the job you're going to end up in a messy, smudgy situation. Instead, arm yourself with longwearing, durable formulas and build them up in layers for intensity and staying power.

The amazing @binxwalton ⚡️⚡️ @marcjacobs SS'18 all about the #EYES @marcbeauty #nyfw A post shared by Diane Kendal (@diane.kendal) on Sep 13, 2017 at 5:21pm PDT

Diane started by penciling out the shape of each eye with Marc Jacobs Finerliner and Highliner in Blacquer before going over the top with the Magic Marc'er Waterproof Liquid to lock it in place and piling on a few coats of Velvet Noir Mascara to bring everything together.

Marc Jacobs SS18pinterest
Rex