Begin Private Key End Private Key Shirt

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Size Guide

Size Chart & Product Information

Measurements are for the garment laid flat. Width is measured across the front, not around the body. Centimeters are converted from inches and rounded to one decimal place. Use the chart for the exact product code you order. Size availability may vary by color.
SIZE WIDTH LENGTH
S 18 in 28 in
M 20 in 29 in
L 22 in 30 in
XL 24 in 31 in
2XL 26 in 32 in
3XL 28 in 33 in
4XL 30 in 34 in
5XL 32 in 35 in
SIZE WIDTH LENGTH
S 45.7 cm 71.1 cm
M 50.8 cm 73.7 cm
L 55.9 cm 76.2 cm
XL 61.0 cm 78.7 cm
2XL 66.0 cm 81.3 cm
3XL 71.1 cm 83.8 cm
4XL 76.2 cm 86.4 cm
5XL 81.3 cm 88.9 cm

Product Information

  • Fabric weight: 5.3 oz.
  • Solid colors: 100% cotton. Ash Grey: 99% cotton / 1% polyester; Sport Grey: 90% cotton / 10% polyester; Dark Heather: 50% cotton / 50% polyester.
  • Classic unisex fit with reinforced neck and shoulder seams and a removable label.
  • 6XL is offered in select colors; it is excluded here because the published chart has an inconsistent length value.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
S 17.25 in 25.5 in
M 19.25 in 26 in
L 21.25 in 27 in
XL 23.25 in 28 in
2XL 25.25 in 28.5 in
3XL 27.25 in 29 in
SIZE WIDTH LENGTH
S 43.8 cm 64.8 cm
M 48.9 cm 66.0 cm
L 54.0 cm 68.6 cm
XL 59.1 cm 71.1 cm
2XL 64.1 cm 72.4 cm
3XL 69.2 cm 73.7 cm

Product Information

  • Preshrunk cotton construction. Ash Grey: 99% cotton / 1% polyester; Sport Grey: 90% cotton / 10% polyester; Dark Heather and Graphite Heather: 50% cotton / 50% polyester.
  • Scoop neckline and a slightly tapered, side-seamed fit.
  • Double-needle stitching with a seamless ribbed neckline.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
S 20 in 26 in
M 22 in 27 in
L 24 in 28 in
XL 26 in 29 in
2XL 28 in 30 in
3XL 30 in 31 in
4XL 32 in 32 in
5XL 34 in 33 in
SIZE WIDTH LENGTH
S 50.8 cm 66.0 cm
M 55.9 cm 68.6 cm
L 61.0 cm 71.1 cm
XL 66.0 cm 73.7 cm
2XL 71.1 cm 76.2 cm
3XL 76.2 cm 78.7 cm
4XL 81.3 cm 81.3 cm
5XL 86.4 cm 83.8 cm

Product Information

  • Fabric weight: 8 oz. Current CustomCat listing: 55% cotton / 45% polyester.
  • Air-jet yarn gives the fleece a softer surface.
  • Ribbed cuffs and waistband include spandex; seams use double-needle stitching.
  • Care: machine wash cold and tumble dry low.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
S 20 in 27 in
M 22 in 28 in
L 24 in 29 in
XL 26 in 30 in
2XL 28 in 31 in
3XL 30 in 32 in
4XL 32 in 33 in
5XL 34 in 34 in
SIZE WIDTH LENGTH
S 50.8 cm 68.6 cm
M 55.9 cm 71.1 cm
L 61.0 cm 73.7 cm
XL 66.0 cm 76.2 cm
2XL 71.1 cm 78.7 cm
3XL 76.2 cm 81.3 cm
4XL 81.3 cm 83.8 cm
5XL 86.4 cm 86.4 cm

Product Information

  • Fabric weight: 8 oz. Current CustomCat listing: 55% cotton / 45% polyester.
  • Unisex pullover with a front pouch pocket and double-needle stitching.
  • Air-jet yarn creates a smooth surface with reduced pilling.
  • Care: machine wash cold and tumble dry low.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
S 18 in 28 in
M 20 in 29 in
L 22 in 30 in
XL 24 in 31 in
2XL 26 in 32 in
3XL 28 in 33 in
SIZE WIDTH LENGTH
S 45.7 cm 71.1 cm
M 50.8 cm 73.7 cm
L 55.9 cm 76.2 cm
XL 61.0 cm 78.7 cm
2XL 66.0 cm 81.3 cm
3XL 71.1 cm 83.8 cm

Product Information

  • Fabric weight: 5.3 oz. Preshrunk cotton jersey; Sport Grey: 90% cotton / 10% polyester.
  • Seamless 7/8-inch collar with double-needle stitching.
  • Reinforced neck and shoulder seams and a double-needle bottom hem.
  • The current product page lists S through 3XL.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
YXS 16 in 20.5 in
YS 17 in 22 in
YM 18 in 23.5 in
YL 19 in 25 in
YXL 20 in 26.5 in
SIZE WIDTH LENGTH
YXS 40.6 cm 52.1 cm
YS 43.2 cm 55.9 cm
YM 45.7 cm 59.7 cm
YL 48.3 cm 63.5 cm
YXL 50.8 cm 67.3 cm

Product Information

  • Fabric weight: 5.3 oz. Solid colors: 100% cotton.
  • Ash: 99% cotton / 1% polyester; Sport Grey: 90% cotton / 10% polyester; Dark Heather: 50% cotton / 50% polyester.
  • Seamless 3/4-inch collar with double-needle stitching, reinforced shoulder seams and a removable label.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
XS 16.25 in 26 in
S 18.25 in 27 in
M 20.25 in 28 in
L 22.25 in 29 in
XL 24.25 in 30 in
2XL 26.25 in 31 in
SIZE WIDTH LENGTH
XS 41.3 cm 66.0 cm
S 46.4 cm 68.6 cm
M 51.4 cm 71.1 cm
L 56.5 cm 73.7 cm
XL 61.6 cm 76.2 cm
2XL 66.7 cm 78.7 cm

Product Information

  • Bella + Canvas 3480 is a unisex jersey tank with side seams.
  • Standard fabric: 4.2 oz., 100% combed ring-spun cotton.
  • Athletic Heather: 90% cotton / 10% polyester; Dark Grey Heather: 52% cotton / 48% polyester.
  • Triblend colors: 3.8 oz., 50% polyester / 25% cotton / 25% rayon.
  • The current product page lists XS through 2XL.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
XS 15.25 in 18.25 in
S 15.875 in 19.25 in
M 16.5 in 19.75 in
L 17.375 in 20.375 in
XL 18.25 in 21 in
2XL 19.125 in 21.625 in
SIZE WIDTH LENGTH
XS 38.7 cm 46.4 cm
S 40.3 cm 48.9 cm
M 41.9 cm 50.2 cm
L 44.1 cm 51.8 cm
XL 46.4 cm 53.3 cm
2XL 48.6 cm 54.9 cm

Product Information

  • Fabric weight: 3.7 oz. Standard blend: 65% polyester / 35% viscose.
  • Athletic Heather: 52% polyester / 48% viscose.
  • Draped silhouette with a round neckline and racerback.
  • CustomCat describes this style as running small and recommends one size up for a fuller fit.
  • Length is measured on the front, from the lowest point of the neckline to the bottom seam.
  • Print method: DIGISOFT®.
SIZE WIDTH LENGTH
YS 17 in 21.25 in
YM 18 in 22.5 in
YL 19 in 24 in
YXL 20 in 25.5 in
SIZE WIDTH LENGTH
YS 43.2 cm 54.0 cm
YM 45.7 cm 57.2 cm
YL 48.3 cm 61.0 cm
YXL 50.8 cm 64.8 cm

Product Information

  • Fabric weight: 7.75 oz.; 50% cotton / 50% polyester.
  • Youth hoodie without a drawcord.
  • CustomCat recommends one or two sizes up for a fuller fit; compare garment measurements before selecting a size.
  • Print method: DIGISOFT®.
  • $0.00
Quantity:

Find your perfect fit before ordering. Check our Size Guide to ensure the best fit and reduce the need for returns.

Estimated arrival: Place your order today (standard shipping method) to receive the product(s) within Nov 03 - Nov 06

Oct 24

Oct 27 - Oct 29

Nov 03 - Nov 06

Category:

The Begin Private Key End Private Key Shirt is made for developers, sysadmins, and cybersecurity pros who want to wear a joke only their people will fully get, whether at a tech conference, a hackathon, or a long day of standups. It turns one of the most sensitive things in computing, a private cryptographic key, into a public statement. Anyone who has ever pasted a key file into a terminal will recognize the reference right away.

Begin Private Key End Private Key Shirt – Security Through Total Honesty

The Begin Private Key End Private Key 2026 Shirt looks like it was copied straight out of a command line. Clean white monospace text sits centered across the chest of a black tee, recreating the exact look of a key file opened in a terminal window or text editor.

The layout follows the real format closely. At the top, the “—–BEGIN PRIVATE KEY—–” line is framed by its signature dashes. Below it, two long rows of zeros stretch across the chest, with the second row ending in a lone 4. At the bottom, “—–END PRIVATE KEY—–” closes the block, just like the genuine file would.

What makes the design effective is its restraint. There are no logos, cartoons, or punchlines spelled out. The humor depends entirely on recognition, so the shirt reads as minimal and understated to most people, and as a sharp inside joke to anyone who has worked with encryption, servers, or crypto wallets. The white-on-black contrast gives it a dark-mode, hacker-at-midnight mood that feels confident rather than loud.

Begin Private Key End Private Key Shirt 2
Begin Private Key End Private Key Shirt

It fits naturally at tech meetups, security conferences, coworking spaces, remote-work days, gaming nights, and anywhere developers gather.

Product Details  

Sizes: S to 5XL (S, M, L, XL, 2XL, 3XL, 4XL, 5XL)
Styles Available: T-Shirt, Long Sleeve, Tank Top, Hoodie, Sweatshirt, Raglan
Material: Cotton for comfort & breathability
Fit: Regular fit, true to size
Colors: Multiple color options available
Origin: Made in USA

Kindly review your personalized details attentively, as numerous orders have arrived incomplete. Note that we exclusively dispatch to valid street addresses.

Grishko collaborates with reputable shipping partners, including UPS, USPS, DHL, and Yun Express, Yanwen.

SHIPPING POLICY

WHAT ARE THE SHIPPING COSTS?

Within the U.S., shipping is priced at 5.99 USD.

International shipping rates start from 13 USD.

WHERE DO WE SHIP?

We offer global delivery services.

Shipping time

US Regions:

Item Handling time (Mon-Fri) Shipping time ( Mon-Fri )
Apparel 1-3 days 3 -7 days
Mug 2-3 days 3-7 days
Poster, Canvas 1-3 days 3 -7 days
Hats 2-3 days 6-8 days
Bedding 3-5 days 7-10 days
3D Clothing, Hawaiian shirt… 3-5 days 8-12 days

Other Countries:

Handling time (Mon-Fri): 3-5 days

Shipping time ( Mon-Fri ): 15-25 days.

Note: Please be advised that shipping times may be influenced by public holidays, destination countries, and courier services.

Delivered

Total delivery time= Handling time + Shipping time

Although we provide estimated shipping times, it’s prudent not to plan your delivery too close to your deadline as unforeseen delays, beyond our control, may occur. Please allow extra time to accommodate such circumstances. While we strive to ensure timely delivery, we cannot be held liable for delays caused by external factors like shipping carriers, weather, holidays, customs clearance, or inaccurate delivery information.

If you encounter any issues with your order or need to make adjustments, feel free to reach out to us at [email protected]. Our team is dedicated to assisting you and resolving any concerns you may have.

Regarding multiple shipping addresses, we regret to inform you that we do not currently support this feature. If you require items to be delivered to different addresses, we kindly ask you to place separate orders for each destination.

Shipping is available to P.O. Box addresses; however, we are currently unable to deliver to military APO/FPO locations.

Regarding VAT taxes, please note that international shipments from the US are sent DDU (Delivered Duty Unpaid), and we do not collect VAT at the time of purchase. The recipient is responsible for any applicable taxes, duties, or customs fees upon receiving the package. Local customs or VAT charges may apply, and we recommend contacting your customs office for further details on your country’s policies.

 
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4.9
Based on 27 reviews
5 star
89
89%
4 star
11
11%
3 star
0%
2 star
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1 star
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1-5 of 27 reviews
  1. C
    Cathy
    Verified owner
    Grishko.comGrishko.com

    The Jersey is great

  2. CB
    Claude B.
    Verified owner
    Grishko.comGrishko.com
  3. NK
    Nathan K.
    Verified owner
    Grishko.comGrishko.com

    Wow, all three! Website was standard e-commerce, customer service promptly responded to my questions twice — though a bit indirectly, delivery tracking was a bit of a black box but once item cleared New Jersey customs I knew it was on its way.

  4. CS
    Charles Stevens
    Verified owner
    Grishko.comGrishko.com
  5. B
    Barbara
    Verified owner
    Grishko.comGrishko.com

    Reliable site. Delivery time as quoted Good customer support