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@morganturnermakeup reviewing One/Size B12 Vitamin Pearl Serum at 01:37 in a YouTube Shorts videoB12 Base Thinner Vitamin Pearl Serum"The one size base thinner is a really amazing product if you don't really care to buy more complexion products."$36.00@angelicanyqvist reviewing One/Size Oil Sucker Extreme Mattifying Alkaline Primer at 02:06 in a YouTube Shorts videoOil Sucker Extreme Mattifying Alkaline Primer"It's still the goat. It's still the best. This is the best mattifying primer according to me that I have tried."$34@aliandreea reviewing One/Size Secure the Blur Makeup Magnet Primer at 05:30 in a YouTube Shorts videoSecure The Blur Makeup Magnet Primer"For oily and combination people out there, One/Size Secure the Blur Makeup Magnet Primer is the product for you because it's going to blur those pores."$36

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B12 Base Thinner Vitamin Pearl Serum
4.9Variant: Pink VersionB12 Base Thinner Vitamin Pearl Serum
  • “The one size base thinner is a really amazing product if you don't really care to buy more complexion products”15:41–15:47
  • “I cannot tell you how much I've been using this. I use this almost every single day”16:00–16:06
  • “You can take like your most full coverage foundation. And depending on the ratio of the base thinner that you've used, you can turn it anywhere from a light coverage foundation to a barely their skin tint”16:04–16:09
  • “This is incredible”
  • “I even really like it with concealers”16:29–16:33
  • “Couple drops of this mixed with that cream concealer, I really do get my ideal coverage point”
  • “I can take any of my favorite foundations and magically turn them into a skin tint”
  • “This is a really nice functional product”
  • Source: Sephora 2026 Sale Top Recommendations - Apr 5, 2026
Dacey CashDacey Cash517K subscribers
4.9Variant: BronzeB12 Base Thinner Vitamin Pearl Serum
  • “I'm a huge fan of this. This is my original like the pink one. I love this stuff”1:22–1:27
  • “You can use it to prime or to cut down coverage of concealer, foundation. You can mix it in with liquid blushes. It's just a really nice product that doesn't pill”1:40–1:46
  • “I actually think the bronze one is really nice for summer cuz it's just going to give you a little bit of that sun-kissed glow”2:03–2:08
  • “My skin literally looks like glass. I'm like obsessed with how glowy it makes my skin”2:57–3:04
  • “It's really nice to play around with, and you get so much more like versatility out of the makeup that you already own, and you don't have to worry about it peeling”3:20–3:23
  • “I also feel like it doesn't conflict with the finish of the makeup too much”3:27–3:32
  • Source: Full Aussie Girl Glam Look & Sephora Sale Haul - May 3, 2026
Dacey CashDacey Cash517K subscribers
4.8B12 Base Thinner Vitamin Pearl Serum
Morgan TurnerMorgan Turner372K subscribers
4.5B12 Base Thinner Vitamin Pearl Serum
  • “This is a vitamin pearl serum foundation fortifier and mixing medium that lets you customize the finish of your foundation while getting skin care benefits in the process”11:09–11:14
  • “It gives you this really natural looking luminosity with these pink and gold pearl pigments. There's nothing shimmery or glittery about this at all”11:18–11:24
  • “I can take matte foundations and turn them into luminous matte foundations that don't look overly glowy or oily and it doesn't change the texture or the coverage of the foundation”11:27–11:32
  • “I think this was such a great kind of innovative launch in 2025. We didn't see anything else like this”11:53–11:59
  • Source: Best makeup of 2025: my standout favorites - Dec 18, 2025
Stephanie MarieStephanie Marie280K subscribers
4.2B12 Base Thinner Vitamin Pearl Serum
  • “This is incredibly versatile. You could use this as a luminizer. It's going to give you that nice glow on the skin without the grease”4:22–4:28
  • “If you have a foundation that you love, but it has too much coverage... you are going to thin it out and give it more glow without changing the formula with a B12 base thinner”4:38–4:47
  • “It has a lot of great ingredients for your skin. So, it's not just a makeup product. This is helping your skin as you use it as it has a lot of B12, C vitamin and E vitamin”5:04–5:10
  • Source: Best makeup in 2025 - Jan 11, 2026
Ali AndreeaAli Andreea1.4M subscribers
mentionsVariant: BronzeB12 Base Thinner Vitamin Pearl Serum
Skyler ReneeSkyler Renee78K subscribers
Oil Sucker Extreme Mattifying Alkaline Primer
4.9Oil Sucker Extreme Mattifying Alkaline Primer
  • “It's still the goat. It's still the best. This is the best mattifying primer according to me that I have tried”1:55–2:06
  • “I will say I only use this where I am oily. So if you only have an oily T-zone like me, do not put this all over your face. It is very mattifying”2:06–2:17
  • “I leave it on for 3 minutes. I try to move my face as low as possible and then I go in with foundation on top. I think it's absolutely amazing”2:22–2:31
  • Source: Best makeup releases of 2025 - Dec 11, 2025
Angelica NyqvistAngelica Nyqvist138K subscribers
Secure The Blur Makeup Magnet Primer
4.2Secure The Blur Makeup Magnet Primer
  • “For oily and combination people out there, One/Size Secure the Blur Makeup Magnet Primer is the product for you because it's going to blur those pores”5:18–5:27
  • “I like to use this especially on my T-zone”5:30–5:36
  • “The way you want to use this is in a very very thin layer and you're going to press it on the skin. You're not going to rub it. I promise you it makes all the difference”5:33–5:40
  • Source: Best makeup in 2025 - Jan 11, 2026
Ali AndreeaAli Andreea1.4M subscribers
Brand note

One/Size is a brand that's carved out a clear lane in setting sprays, specifically with formulas that address the tension between wanting makeup to last and not wanting it to look powdery or flat. The Powder Melt Glass Setting Spray is the standout here — it creates a film over the complexion that extends wear time while melting powders into the skin for a dewy-but-not-sticky finish. Creators consistently note it's best for those who dislike the look of powder or want a glassy sheen without feeling tacky. The trade-off?

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