Customer Service: service@sislil.com
Free shipping on Orders Over $45





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Free standard shipping on orders over $45
Estimated to be delivered in 8-25 days.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
💖 "I Am The Oldest Sister" – Wear Your Title Like a Crown!
Who says leadership can’t be stylish?
Slip into this tee and let the world know—you’re the wisest, the boldest, and the one who always keeps the squad in line. 👑
✨ Why This Tee is Everything
Instant Authority– That "oldest sister energy" speaks before you do.
Nostalgia Meets Sass – Celebrates your role without taking it too seriously (but yes, you're still in charge).
Cloud-Level Comfort– 100% cottony softness that gets better with every wear.
Goes With Your Whole Life – Dress it up with a blazer or keep it real with joggers—it's your call, boss.
💡 When You'll Wear It On Repeat
Sibling Hangouts – For when they still need your advice (and snacks)
Brunch Dates – Paired with jeans and your signature "I've got this" attitude
Errand Royalty – Because even grocery runs deserve a power top
👑 More Than a Shirt—It's a Legacy
Your childhood bedroom may not have been the biggest, but this tee proves your influence always was.🛍️
Product Details
Style: Casual
Sleeve Length: Short Sleeve
Sleeve Type: Regular
Length: Regular
Material: 90% Cotton, 10% Polyester
Care: Machine wash or professional dry clean
| Size | Shoulder | Bust | Length | |||
| cm | inch | cm | inch | cm | inch | |
| XS | 40 | 16.1 | 92 | 36.2 | 62 | 24.4 |
| S | 42 | 16.9 | 96 | 37.8 | 64 | 25.2 |
| M | 44 | 17.7 | 98 | 38.6 | 66 | 26 |
| L | 46 | 18.5 | 104 | 40.9 | 68 | 26.8 |
| XL | 48 | 19.3 | 108 | 42.5 | 70 | 27.6 |
| 2XL | 50 | 20.5 | 126 | 49.6 | 72 | 28.3 |
| 3XL | 52 | 20.9 | 132 | 52 | 74 | 29.1 |
| 4XL | 54 | 21.3 | 138 | 54.3 | 76 | 29.9 |
| 5XL | 56 | 22.0 | 144 | 56.7 | 78 | 30.7 |
| *This data was obtained from manually measuring the product, it may be off by 1-2 CM. | ||||||
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