Beauty Sephora Size Up Mascara Buys: Best Amazon Picks That Work
Sephora Size Up mascara promises plus 180 percent volume with an hourglass wand. It is a Sephora Collection exclusive, so you cannot buy it on Amazon. This guide covers the closest Sephora Collection eye products that Amazon does carry. You get honest picks, real prices, and clear buying advice.
The closest match on Amazon is the Sephora Collection Big By Definition mascara. It is a defining and volumizing formula in a two pack. Pair it with a Sephora Collection eyeliner to copy the full Size Up eye look. Both products come from the same brand line you wanted.
We checked listings, prices, and seller details before recommending anything. Every product below is a real Sephora Collection item sold on Amazon. No fake dupes, no guesswork. Read the buying sections, then pick the option that fits your routine and budget.
Key Takeaways
- Our top pick balances performance, gentleness, and value for most people.
- Match the formula to your specific needs using the buying criteria below.
- Read real verified reviews before buying, since marketing claims often overpromise.
Quick Answer: Top 3 Picks
- Sephora Collection Big By Definition Defining and Volumizing Mascara, 2 Pack Defining and volumizing mascara.
- Sephora Collection Long Lasting Eyeliner High Precision Brush, 01 Black High precision brush tip.
- Sephora Collection Waterproof 12HR Retractable Eyeliner Pencil, 27 Matte Forest Green Waterproof 12HR formula.
Full reviews and comparisons below.
On This Page
Our Top Picks
Best for: Shoppers who want Sephora Collection lash volume from Amazon.
#1 Best OverallSephora Collection Big By Definition Defining and Volumizing Mascara, 2 Pack
- Defining and volumizing mascara
- Long wearing formula
- Sephora Collection branding
Pros
- Closest Sephora Collection mascara on Amazon
- Two pack gives strong value per tube
- Long wearing defining formula
Cons
- Not the actual Size Up formula
- Two tubes may expire before use
Best for: Anyone pairing bold mascara with sharp liner definition.
Runner-UpSephora Collection Long Lasting Eyeliner High Precision Brush, 01 Black
- High precision brush tip
- Intense black pigment
- Long lasting wear
Pros
- Ultra fine tip for precise lines
- Highly pigmented black formula
- Long wearing finish
Cons
- Liquid liner needs practice
- Not waterproof
Best for: Waterline definition and smudge proof everyday wear.
Best ValueSephora 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
What Sephora Size Up Actually Is
Sephora Size Up is a volumizing mascara from Sephora Collection. Its hourglass brush has short fibers in the center and longer fibers at the ends. Short fibers load lashes with dense black pigment. Long fibers separate, lengthen, and curl each lash. The brand claims up to 180 percent more volume after twenty strokes. The formula is vegan and long wearing. It comes in Ultra Black plus blue, brown, burgundy, and pink shades. A mini version exists for travel. It sells only through Sephora stores and Sephora websites. That exclusivity is exactly why Amazon shoppers need an alternative plan.
Why You Cannot Buy It on Amazon
Sephora Collection keeps Size Up exclusive to its own channels. Third party Amazon sellers do not list it reliably. Any listing you might spot is likely old stock or a reseller markup. You should not pay inflated prices for expired mascara. Old mascara can irritate eyes and clump badly. The smart move is buying other Sephora Collection products on Amazon. Big By Definition mascara is the closest formula match. Sephora eyeliners complete the look. You stay inside the brand family without the risk.
The Closest Amazon Alternative
Big By Definition is the Sephora Collection mascara sold on Amazon. It defines and volumizes with a long wearing formula. The Amazon listing is a two pack, which stretches your money further. Expect fuller looking lashes with buildable coverage. It will not copy the Size Up hourglass brush exactly. It still delivers the bold lash look most Size Up fans want. Check the seller rating before you buy. Stick to listings that show the Sephora Collection branding clearly.
Pairing It With Eyeliner
A volumizing mascara looks best with a clean lash line. The Sephora Collection Long Lasting eyeliner gives precise black definition. Its ultra fine brush tip makes winged looks easier. The Waterproof 12HR retractable pencil suits lower lash lines and waterlines. Interestingly, its own Amazon page suggests finishing with Size Up mascara. Use mascara first, then liner, for the sharpest result. Remove both with a waterproof eye makeup remover at night.
Who Should Skip This Route
Skip these picks if you only want the exact Size Up formula. Buy it directly from Sephora instead. Skip the two pack if you rarely wear mascara, since mascara expires after three months. Choose a single tube from Sephora in that case. If your eyes are very sensitive, patch test any new mascara first. People who want waterproof wear should check formulas carefully, since not every pick here is waterproof.
How to Choose Within Your Budget
Budget options work well for everyday needs. Mid-range products often deliver better ingredients and performance. Premium options suit those wanting the best formulas. Price does not always equal quality: several of our top picks are affordable. Set your budget first, then choose the best performer within it.
Final Thoughts
Choosing the right sephora size up mascara product comes down to matching formulas to your specific needs and routine, not chasing viral trends. Start with our top pick for the safest bet, or use the buying criteria above to narrow down based on your needs and budget. Consistency matters more than perfection: even the best product needs regular use for great results.
How We Test and Rank Products
We start with search data to find the products real shoppers actually buy. Then we analyze thousands of verified Amazon reviews, looking for patterns in praise and complaints. We check ingredient lists against expert guidance and compare specifications side by side. Products earn their ranking through consistent real-world performance, not marketing budgets.
Frequently Asked Questions
No. Size Up is a Sephora Collection exclusive sold only through Sephora. You will not find an official listing on Amazon. This guide recommends the closest Sephora Collection alternatives that Amazon does carry.
Sephora Collection Big By Definition mascara is the closest match. It volumizes and defines lashes with a long wearing formula. The Amazon listing comes as a two pack for better value.
No. The hourglass brush is unique to Size Up. Big By Definition uses its own volumizing brush. You still get bold, full lashes, just with a different applicator shape.
Replace mascara every three months after opening. Old mascara grows bacteria and irritates eyes. Write the open date on the tube so you remember.
The Long Lasting liquid eyeliner gives sharp definition for dramatic looks. The Waterproof 12HR pencil works better for waterlines and softer everyday definition. Pick based on the look you wear most.
Sephora Collection states its products are not tested on animals. Size Up is also vegan. The Amazon alternatives come from the same brand line.