USN N-1 Undershirt

Size chart
How to measure

How to choose your size?

Don't know how to choose your size? Don't worry, We'll help you find the perfect size.


 1. Where can we find 'SIZE & FIT'?

Every product page on our website has a 'SIZE & FIT', just click it to find out the measurements which you can view in centimeters and inches.


 2. Where can we find the 'Size Guide'?

Every product page on our website has a 'Size Guide', just click to see how we measure. Or you can click "Click Here" at the bottom of the 'SIZE & FIT' page to see how we measure.

3. Where is the size of the Model displayed?

Just click 'SIZE & FIT' to find out the model's size and measurements.

4. How to measure the product’s size?

Outerwear & Tops

‚φ Shoulder:
Measure from where the shoulder seam meets the sleeve on one side to another side.
‚Ď° Chest:

Measure from the stitches below the armpits on one side to another.

‚ĎĘ Sleeve:

Measure from where the shoulder seam meets the armhole to the cuff.

‚Ď£ Length

Measure from the center of the collar edge to the bottom of the garment.   



‚φ Waist:

Measure straight across the top of the waistband from edge to edge.

‚Ď° Front Rise:

Measure from the bottom of the front rise to the top of the front rise.

‚ĎĘ Seat:

Measure straight across the widest hip line from edge to edge.

‚Ď£ Back Rise:

Measured from the crotch seam to the top edge of the back waistband.

‚ϧ Thigh:

Measure across straight from the crotch seam to the outside of the leg.

‚Ď• Leg Opening:

Measure straight across the leg opening.

‚϶ Inseam:

Measure the length from the crotch seam to the bottom of the leg.

‚Ďß Length:

Measure from the waistband to the leg opening or hem.


** Need more help? you can Contact Us to help you. **
Color: Apricot
Size: S

4 items left

  • Free Shipping On ¬£79 + 30-day Returns
  • First Order Free Exchange


  • 5' 10", 158lbs / 178cm, 72.5kg. Size M.

This is a replication of a 1950s USN N-1 undershirt. Originally used for training wear within the US Navy in the 1950s, the thick bib-like patch over the chest and back constructed with 4 needle stitching is to improve the durability of the garment. It was made of a heavy-duty fabric blended with wool and cotton. Its advantage is that it is very warm, but the disadvantage is obvious, it is terrible to wear skin feeling.

This version is tailored to the original version, and it is made of heavy-duty 13.5 oz cotton fabric that is close to the first edition thickness and texture, restoring the style of the original version, while heavyweight and has a comfortable skin feeling, really integrated into life.

  1. 13.5 oz combed ringspun cotton fabric, 100% cotton.
  2. Machine washable.
  3. Model Billy is height 5' 10"/ 178cm, weighs 159lbs/ 72.5kg, wears a size M, wears effect is slightly slim fit

Please carefully read the size info before purchase! Different products have different size info.
Please use this info as a general guide as measurements are approximate.

  • Size Shoulder Chest
    S  15.7" / 40 cm 35" / 89 cm
    M 16.5" / 42 cm 36.6" / 93 cm
    L 17.1" / 43.5 cm 38.2" / 97 cm
    XL 17.7" / 45 cm 39.8" / 101 cm
    18.5" / 47 cm 41.3" / 105 cm

    Size Sleeve Length
    S 23.4" / 59.5 cm 25.2" / 64 cm
    M 24" / 61 cm 25.8" / 65.5 cm
    L 24.6" / 62.5 cm 26.4" / 67 cm
    XL 25.2" / 64 cm 27.2" / 69 cm
    XXL 25.8" / 65.5 cm 28" / 71 cm

In order to best determine fit, it may be helpful to compare our garment’s measurements to a similar garment you already own. Lay your garment on a flat surface and take all measurements from the outside of the garment.

Click here to check out our Garment Measuring Guide.

** If you are still confused, you can Contact Us to help you choose the size. **

Free shipping on orders £79 (Pound Sterling), Otherwise, a shipping fee of £5.99 will be charged.
Click here to see our full shipping policy.

Olderbest offers 30 days returning period.
Click here to see our full return & exchange policy.
* All items must be returned in unused, original condition with tags attached.
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