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All Olive Basics – Functional Womenswear Collection
Two women stand side by side indoors, each wearing the Olive Basics Bella Multi-way V-neck Shirt in relaxed, linen blend fabric and neutral hues. One wears light beige while the other styles her olive green shirt over a yellow top as they face the camera.
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Two women indoors model the Sarah Reversible Button Tank by Olive Basics—one in dark green facing forward, one in navy facing back—highlighting this versatile maternity top.
A woman in the Olive Basics Sarah Reversible Button Tank in Forest Green sits on a light sofa with neutral cushions and vases behind her—a blend of comfort and style, making it an ideal choice for maternity wear.
A pregnant woman in the Olive Basics Sarah Reversible Button Tank, a sleeveless dark green maternity dress, stands indoors gently holding her belly and leaning against a light-colored wall.
Two women in Olive Basics’ Sarah Reversible Button Tank—ideal for maternity or nursing—one in green, one in navy, relaxing on a white sectional with large ceramic vases behind them.
A woman stands barefoot in a modern, minimalist room with curved white couches, wearing the Olive Basics Sarah Reversible Button Tank—a sleeveless burgundy top with nursing access—and wide beige pants.
A woman stands indoors by a white staircase and chair, wearing Olive Basics’ Leah Super Stretch Slit Skirt and a sleeveless burgundy buttoned top, both on a white floor.
A woman with brown hair in a ponytail models the Olive Basics Sarah Reversible Button Tank in maroon, paired with cream wide-leg pants—an ideal choice for chic maternity wear in a modern white interior.
A woman stands indoors before a modern white backdrop, wearing the Olive Basics Sarah Reversible Button Tank in burgundy with light beige pants.
A woman sits cross-legged on a light sofa, wearing the Olive Basics Sarah Reversible Button Tank in burgundy and beige pants, with a plant in a white pot in the background.
A woman in the Olive Basics Sarah Reversible Button Tank, sleeveless and olive green, with a matching skirt, stands barefoot indoors by a white vase of dried pampas grass and ceramic decor on white shelves.
Two women in sleeveless maternity wear stand barefoot by shelves with pottery—one wears the Olive Basics Sarah Reversible Button Tank and midi skirt in olive green, the other wears a navy blue outfit.
A woman stands barefoot indoors, arms crossed, wearing the Olive Basics Sarah Reversible Button Tank in olive green, with pottery displayed in the background.
A woman stands barefoot indoors by a white spiral staircase, wearing Olive Basics Sarah Reversible Button Tank—with nursing access—paired with a sleeveless olive green vest and matching skirt.
A smiling barefoot woman indoors wears the Olive Basics Sarah Reversible Button Tank and matching skirt, touching her baby bump. Neutral pottery and dried pampas grass decorate the background.
A woman with a braid shows the side button opening for nursing on the sleeveless Sarah Reversible Button Tank by Olive Basics, standing indoors.
A woman with dark braided hair, barefoot indoors near decorative vases, wears the Olive Basics Sarah Reversible Button Tank and a skirt, shown from behind.
A pregnant woman in the Olive Basics Sarah Reversible Button Tank, a stylish sleeveless navy dress, stands indoors by a white wall and green plant, resting her hand on her belly while looking at the camera.
A woman with long blonde hair stands barefoot indoors, wearing the Olive Basics Sarah Reversible Button Tank and a matching midi skirt beside a sliding glass door and potted plants.
A pregnant woman with long dark hair stands indoors near a window, wearing the sleeveless navy Sarah Reversible Button Tank by Olive Basics.
A woman with long dark hair touches her pregnant belly while wearing the Olive Basics Sarah Reversible Button Tank, a sleeveless black maternity top with nursing access, standing indoors.
A woman with long dark hair stands indoors by a window with sheer curtains, wearing the Olive Basics Sarah Reversible Button Tank in navy, featuring buttons down the back.
Two women chat over mugs, smiling. One wears a beige Sarah Reversible Button Tank and matching skirt by Olive Basics; the other sports a navy version of the same sleeveless top and skirt.
A woman stands indoors wearing the Olive Basics Sarah Reversible Button Tank in wine, paired with a matching long skirt, smiling and resting one hand on a white surface.
A woman in the Olive Basics Sarah Reversible Button Tank in Forest Green sits on a light sofa with neutral cushions and vases behind her—a blend of comfort and style, making it an ideal choice for maternity wear.

Fabric Composition: 82% TENCEL and 18% Nylon

Features: Reversible, Easy buttons, Breastfeeding-friendly, Quick drying, Moisture wicking, Stretchable, and Wrinkle resistant

Fit Facts: Model is 177cm, UK 6-8 and wears Size S/M. Because it's super stretchy, each size caters to a range of regular sizes.

Sarah Reversible Button Tank

$89.00

She's made from TENCEL™ knit that stretches up to 2 sizes beyond her label.

Size guide (in cm)

Size Chart - Sarah Reversible Button Tank

Sarah is made from our super stretchy TENCEL™ knit, so it has plenty of room to stretch and accommodate a wider range of sizes.

Each size can comfortably fit up to 2 sizes bigger than its original size.

For example, our XS/S can fit approximately UK 6–10, depending on your preferred fit.

 Measurements (CM) XS/S S/M M/L
UK Size UK 6-8 (up to 10) UK 8-10 (up to 12) UK 12-14 (up to 16)

Chest width across (super stretchy)

 37 42 44
Hem width across 56 57 58
Length 54 56 58

 

Why do we have dual size labels? Find out here


Need a different size? Full-price items can be exchanged within 14 days. Exchange policy

Free SG shipping over S$150, at your doorstep in 2–3 working days.

Need a recommendation? Chat with us (bottom right).

Fabric Composition: 82% TENCEL and 18% Nylon

Features: Reversible, Easy buttons, Breastfeeding-friendly, Quick drying, Moisture wicking, Stretchable, and Wrinkle resistant

Fit Facts: Model is 177cm, UK 6-8 and wears Size S/M. Because it's super stretchy, each size caters to a range of regular sizes.

Key Features

Reversible Neckline

Can be worn with functional buttons in front or high neckline with buttons at the back, depending on the mood or occasion.

Soft & Big on Stretch

Paired with beautiful curved hemline, the TENCEL™ knit fabric flatters many body types and feels great on skin. Each size can accommodate up to 2 sizes bigger than its original size.

Great for Layering

Open it up as a vest and pair it with a tank top for a pop of color.

Easy-care Fabric

Machine washable and wrinkle-resistant for hassle-free maintenance.

Product Details

Made with a highly stretchy TENCEL™ knit, the Sarah Tank offers plenty of stretch for a flexible and forgiving fit. Each size can accommodate up to 2 sizes bigger than its original size.

She is a super soft and relaxed reversible tank top that can be dressed up or down whether you're heading to work or having a chill day out. Wear it as a co-ord with the Leah Super Stretch Slit Skirt or go casual with our Joanna Expandable Pocket Shorts.

  • Reversible neckline (High, Scoop)
  • Can be worn as outerwear/waistcoat too!
  • Side zips or unbutton for nursing access
  • Flare cutting to accommodate baby bump
  • Curved hemline
  • Naturally anti-bacterial
  • Moisture wicking and quick drying

Model is 165cm, UK 6-8 and wears Size XS/S.

Wash & Care Guide

TENCEL®, TENCEL® Blends 

(100% TENCEL, or blends with Nylon, Polyester, Denim or Viscose)

  • TENCEL Denim and 100% TENCEL Woven fabrics will fade naturally over time—each piece tells its own story.
  • TENCEL Linen or TENCEL Cotton retain colours best. 
  • Always flip inside out.
  • Use a garment bag.
  • Cold wash or gentle hand wash for delicate items. Since it's anti-bacterial, you really don't have to wash it after every wear—simply air it out for days of light wearing.
  • Avoid prolonged sunlight drying to retain softness.
  • Hang to dry.
  • Use a steam iron if desired. 

TENCEL® KNITS

  • Do not hang, only lay flat to dry or line dry. 
  • Do not leave out in direct sunlight. 
  • Fold to store, do not hang as it will stretch out. 
  • No ironing needed, but steam iron if desired. 

A little note: 

We create our pieces to live with you—and we know life gets busy. Whether you're a high-performance individual with a busy schedule, a mother in the newborn trenches, or juggling all the moving parts of household and work, the best way to care for your clothes is the way that is most practical for you. So think of this not as a rulebook, but a gentle guide.

If you don't mind a little character in your clothes as they age, just follow this fuss-free method:
Cold wash, inside out, in a garment bag. Without removing from the bag, tumble dry on a gentle setting with a moderate load. Done.

  • 5 stars: 5 (71%)
  • 4 stars: 2 (29%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
C
Casey
Versatile

I love the Sarah Reversible Button Tank so much that I got it in two different colors! It’s incredibly functional and perfectly designed for nursing

B
BW
Wine is a Winner

I already fell in love with the cutting and material for this Sarah and Leah set. Then they made it in this gorgeous deep purple/red colour. Just take my money already.

L
Laurensia Mandasari
Perfect fit

This Sarah Reversible Tank fits beautifully—snug but stretchy, and super comfortable all day, especially in Singapore super hot weather. The fabric feels soft and breathable, and it stays in place without clinging. Perfect for layering or wearing solo!

I
Inez
Satisfying Sarah!

The Sarah reversible button tank is really comfortable and true to picture! It’s just that the button at the middle looks considerably darker under all kinds of light for the piece I got, which makes it look off. Love this piece though, I’m already considering getting in another color!

A
Alexis Loh
Quality clothes and good customer service

Loved the pieces I got during the Boutique fair. Came home and realized that one of the pieces was in the wrong size ordered and contacted OB immediately. They were very prompt in following up and even offered to exchange the right size along with pickup at my home. Can’t ask for more really. Will definitely look out for their new collections.

Y
Yeap Amelia
Good buy

I got the esther nursing tank, the sarah top and the leah skirt. Love the tencel knit material, very cooling for singapore weather and stretchable. Top is a little small on the arm holes for me but should stretch out with time. The nursing tank is not long enough to cover the belly when pregnant but when paired with high waisted bottoms is still a versatile piece! Think i could have gotten a size larger though for comfort, but still fits (am usually a UK 8). Overall a good buy!

G
Gracelyn Low
excellent workmanship and quality

Bought the Leah super stretch slit skirt and Sarah reversible tank and I really love the material! It is so luxuriously soft and comfortable to the skin! It is NOT HOT at all! Perfect for our SG weather. Super glad I got both!

Really great creations! Keep it up, OB! :)

Understanding Fabrics

TENCEL Knit

Beyond style, fabrics play a key role in making your garment practical and worthy of being an everyday staple. Learn more to know what you're investing in.

Read More

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