Beauty Sephora Eye Makeup on Amazon: Mascara vs Liner Compared
Sephora Size Up itself is not on Amazon, so this comparison looks at what is. We pit the Sephora Collection Big By Definition mascara against the Sephora Collection Long Lasting liquid eyeliner. One builds lash volume, the other defines the lash line. Both come from the brand line you were searching for. The table below breaks down price, format, best use, and more. Read the verdict to see which one gets you closer to the Size Up look.
| Factor | Sephora Collection Big By Definition Def | Sephora Collection Long Lasting Eyeliner |
|---|---|---|
| Price | Check price | Check price |
| Product type | Volumizing mascara | Liquid eyeliner |
| Best for | Full, bold lashes | Sharp lash line definition |
| Key feature | Defining and volumizing formula | Ultra fine precision brush tip |
| Size | Two tubes | One pen |
| Rating | ~4.3 | ~4.2 |
| Formula type | Long wearing mascara | Long wearing liquid liner |
| Ease of use | Beginner friendly | Needs a steady hand |
Our Verdict
The mascara wins for Size Up fans. Big By Definition is the only pick that copies the volumizing mission of Size Up. It gives you the bold lash look in one step, and the two pack keeps the cost per tube low. The eyeliner is excellent, but it solves a different problem. Buy the liner if your lashes are already full and you want definition. Buy the mascara if volume is the goal. Most shoppers chasing Sephora Size Up want volume, so the mascara is the honest recommendation here.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.
Best for: Waterline definition and smudge proof everyday wear.
Sephora Collection Waterproof 12HR Retractable Eyeliner Pencil, 27 Matte Forest Green
- Waterproof 12HR formula
- Retractable pencil with sharpener
- Creamy blendable texture
Pros
- Waterproof 12 hour wear
- Creamy retractable pencil format
- Built in sharpener included
Cons
- Green shade is bold for daily wear
- Single shade option in this listing
Mascara for Contact Lens Wearers With Dry Eyes
Dry eyes plus contact lenses make mascara flaking a vision problem, not just a cosmetic one. Traditional mascara flakes become particles trapped under the lens, causing irritation and blurring. Tubing mascaras solve this best: the polymer tubes do not flake into particles, so nothing migrates under the lens. If you wear lenses daily, tubing is worth switching for.
With traditional volumizing formulas like the Size Up line, reduce flake risk through technique. Apply mascara to the upper lashes only on dry-eye days, since lower-lash product flakes upward into the eye. Let each coat dry fully before adding another, because wet layering creates the brittle coating that flakes later. Carry rewetting drops and use them instead of rubbing when eyes feel dry. If flaking persists despite careful application, the formula is too dry for your eyes and a tubing switch is the honest fix. Our mascara tips for sensitive eyes cover more irritation-free strategies.
Mascara on Hooded Eyes: Stopping Brow-Bone Transfer
Hooded lids press against the lash line all day, and volumizing mascaras transfer to the brow bone because their rich formulas stay mobile longer. The Size Up volumizing mission makes transfer more likely, so hooded-eyed buyers need countermeasures. Tubing formulas transfer least, followed by firmly-setting traditional formulas. The two-pack value matters less if half the product ends up on your brow bone.
Practical fixes: dust translucent powder on the brow bone and crease before mascara, let the mascara dry a full minute before opening eyes wide, and consider tubing mascara for the upper lashes while keeping volumizing formulas for special occasions. Waterproof versions transfer least of all traditional options. Test on a normal workday before trusting any mascara for an event, since hooded transfer worsens with heat and long hours. Our tubing mascara guide explains the transfer-proof format in detail.
Ingredient Watch-Outs for Sensitive Eyes
Sensitive eyes react to specific mascara ingredients, not to mascara in general. Common irritants include fragrance, which has no function in mascara and appears purely for scent, fibers added for length that shed into eyes, and certain preservatives. Carbon black pigment irritates some wearers while iron oxides suit them better, though reactions vary individually.
If your eyes water, itch, or redden with most mascaras, switch to a fragrance-free formula first, since fragrance is the most common and most avoidable trigger. The Big By Definition alternative keeps the volumizing mission with a different formula worth testing if Size Up irritates. Patch-test by applying to one eye's outer lashes for a day before full application. Replace mascara at the first sign of irritation rather than pushing through, since sensitized eyes react more strongly over time. Our volumizing mascara guide covers wand and formula factors that affect comfort.
One more volume technique: wiggle the wand at the lash roots before pulling through to the tips. Root wiggling deposits the most product where volume actually shows, while smooth pull-throughs just lengthen. The Size Up brush is designed for exactly this motion.
The two-pack keeps the per-tube cost low, which matters because volumizing mascaras dry out faster than lengthening ones. The thick formula that builds volume also thickens in the tube, so fresh tubes perform noticeably better.
The Forest Green eyeliner in this comparison deserves attention on its own: green liner makes brown eyes glow and suits hazel eyes beautifully. It is the easiest colored liner for neutrals-lovers to try first.