Size Guide
1 inch is the margin inside which every size chart on vobirax.com holds true, and the chest figure in that chart, not the letter on the tag, is the number this page teaches you to use.
The letter on the tag or the chest figure
Why order by the chest figure instead of the usual size?
Because the letter means something different on every garment. Among the sweaters alone, a size M measures anywhere from 35.4 inches across the chest on the slim turtleneck to 45.3 inches on the henley collar sweater, a difference of nearly 10 inches under the same letter. Every listing therefore carries its own chart, measured on the garment laid flat, and the chest figure in that chart is what to match. Example: a man who measures 38 inches around the chest orders 2XL in the slim turtleneck, whose 2XL chest figure is 40.2 inches, and S in the henley collar sweater, whose S figure is 43.3 inches.
A tape measure or a shirt in the closet
How is the chest figure found at home?
- Take a shirt or sweater that already fits the way you like.
- Lay it flat on a table, buttoned or zipped, and smooth it out.
- Run the tape straight across the chest, armpit seam to armpit seam, at the bottom of the seams.
- Double that number: the result is the chest figure to compare with the chart.
- Length is taken from the shoulder point beside the collar straight down to the hem, and the sleeve from the shoulder seam out to the cuff, if those two matter to you.
Example: a shirt that measures 22 inches across the chest flat has a chest figure of 44 inches, and matches a listing whose chart shows 44.1 inches for that size.
Slim or loose
What does the fit word add?
Each listing names its fit in one word, and the word tells you how much room the chest figure leaves relative to the body:
| Fit word | How it sits | Chest figure to choose |
|---|---|---|
| Slim, athletic slim | Close to the body, little room under the arm | Your own chest plus 2-3 inches |
| Regular | Ordinary room, the cut most men expect | Your own chest plus 3-5 inches |
| Loose, relaxed, dropped shoulder | Room to layer, a lower shoulder seam | Your own chest plus 5-7 inches |
A chart figure already includes the room the cut allows, so comparing a shirt you own with the chart, as above, is more reliable than measuring your body. Use the body method only when no shirt of yours fits well: run the tape around the widest point of the chest, keeping it level and under the arms, and add the inches in the table.
Inches or centimeters
Which unit does the chart use?
Both. Every chart lists inches first and centimeters second, and the 1-inch tolerance equals 2.5 cm. The tape in most American homes reads inches, and the numbers in this guide follow it.
Sweaters, shirts, or shirt jackets
How do the three groups differ in size?
The ranges below are drawn from the charts of every garment on the site on Oct 21, 2026 and show how far apart two garments with the same letter can be. Always read the chart on the listing itself; the table is a map, not a chart.
Sweaters in S or in 3XL
| Size | Chest figure across the sweaters (inches) |
|---|---|
| S | 37.8 to 43.3 |
| M | 35.4 to 45.3 |
| L | 37.0 to 47.2 |
| XL | 38.6 to 49.2 |
| 2XL | 40.2 to 51.2 |
| 3XL | 41.7 to 53.5 |
Several sweaters start at M, the slim turtleneck among them, and the relaxed crewneck in wine red stops at 2XL.
Shirts in XS or in 5XL
| Size | Chest figure across the shirts (inches) |
|---|---|
| XS | 40.9 |
| S | 41.3 to 43.3 |
| M | 43.3 to 45.3 |
| L | 45.3 to 48.0 |
| XL | 47.2 to 51.2 |
| 2XL | 49.2 to 55.1 |
| 3XL | 51.2 to 59.1 |
| 4XL | 55.9 to 56.7 |
| 5XL | 58.3 |
One shirt, the stretch dress shirt in burgundy, carries XS; the corduroy shirt runs to 5XL and the athletic fit dress shirt to 4XL. The shirt with the plaid trim starts at M and jumps about 3 inches per size, so measure before choosing it.
Cardigans and shirt jackets in S or in 3XL
| Size | Chest figure across the cardigans and shirt jackets (inches) |
|---|---|
| S | 40.9 to 44.1 |
| M | 42.5 to 46.1 |
| L | 44.1 to 48.0 |
| XL | 45.7 to 50.4 |
| 2XL | 47.2 to 52.8 |
| 3XL | 49.6 to 55.1 |
A cardigan or shirt jacket worn over a shirt needs the extra room its fit word describes; the loose shirt jackets allow about 5 inches, the cardigans 3-4. The plaid shirt jacket in red and black stops at XL, and the stand collar cardigan starts at M.
A dropped shoulder or a set-in sleeve
Why do some sleeve figures look short?
On a dropped-shoulder cut the seam sits down the upper arm, so the chart’s sleeve figure, measured from that seam, is shorter than on a set-in sleeve even when the total reach is the same. The relaxed crewneck sweater, the V-neck cable knit sweater, the knit polo collar sweater, the ribbed full zip cardigan, and the plaid shirt jacket are cut this way, and their listings say so.
A 1-inch difference or a return
What if the garment does not match the chart?
Measure it flat the same way. Within 1 inch of the chart in every figure, the garment is as described, and a poor fit counts as a change of mind, handled by the Refund and Returns Policy with a size exchange while stock lasts. More than 1 inch off in any figure, the garment is not as described; the company then pays the return postage and either replaces the garment or refunds the order in full.
The Refund and Returns Policy or a question about a chart
Read next: the Refund and Returns Policy, which carries the size exchange rule, the 30-day window, and the condition a returned garment must be in.
For a question about a particular garment’s chart, customer service at IMPOWER ATLANTA LLC answers contact@vobirax.com and +1 (559) 549-2043 on weekdays from 8:30 a.m. to 5:30 p.m. Pacific, replies within 1 weekday, and reads every message sent through the Contact Us page.
This page has been in force since Oct 21, 2026.