ThriftFit handbook
Measurement Guide
Measure garments the same way every time so ThriftFit can compare secondhand listings against the clothes that already fit you.
Before you start
Use one setup and repeat it.
Tools
- Flexible tailor tape
- Flat table or clean floor
- Reference garment that fits
- Notes app or ThriftFit reference editor
Rules
- 1. Measure flat, relaxed fabric.
- 2. Keep flat width and circumference clearly labeled.
- 3. Compare like garment types against each other.
Wovens, overshirts, polos
Shirts
Shirts are easiest to compare when the garment is buttoned, flattened, and measured from stable seam points.
Chest
Pit-to-pit width across the front of a buttoned shirt.
How to measure
- 1. Button the shirt and smooth the front without stretching.
- 2. Measure straight from armpit seam to armpit seam.
- 3. Double the number only when a total chest circumference is requested.
Common mistakes
- xLetting the tape arc upward
- xMeasuring below the pit seam
- xMixing flat width with doubled circumference
Why it matters: Chest is the fastest signal for whether the shirt will close and drape cleanly.
Trim
18-19
Close
19-20
Regular
20-22
Relaxed
22-23
Oversized
23+
Shoulder
Straight distance between the shoulder seam points across the back yoke.
How to measure
- 1. Flip the shirt face down.
- 2. Find the outer shoulder seam points.
- 3. Measure straight across, keeping the tape level.
Common mistakes
- xFollowing the curve of the yoke
- xStarting at the sleeve edge
- xMeasuring across wrinkles
Why it matters: Shoulder width controls sleeve pitch and how structured the shirt feels.
Trim
16-17
Close
17-18
Regular
18-19
Relaxed
19-20
Oversized
20+
Sleeve
Sleeve length from shoulder seam to cuff edge.
How to measure
- 1. Lay the sleeve flat with the cuff closed.
- 2. Start at the shoulder seam.
- 3. Measure along the outside edge to the cuff.
Common mistakes
- xMeasuring from the collar
- xStopping at the cuff seam
- xLetting the sleeve bend under the tape
Why it matters: Sleeve length is a hard comfort check for cuffs, watches, and layering.
Trim
23-24
Close
24-25
Regular
25-26
Relaxed
26-27
Oversized
27+
Length
Back length from the base of the collar seam to the hem.
How to measure
- 1. Keep the shirt face down.
- 2. Start where the collar band meets the back panel.
- 3. Measure straight to the longest point of the hem.
Common mistakes
- xStarting at the top of the collar
- xMeasuring the front instead of the back
- xIgnoring a curved tail
Why it matters: Length decides whether the shirt works tucked, untucked, or layered.
Trim
27-28
Close
28-29
Regular
29-31
Relaxed
31-32
Oversized
32+
Blazers, coats, truckers
Jackets
Jackets need relaxed fabric and careful seam selection because padding, lining, and lapels can distort the tape.
Chest
Flat width from armpit to armpit with the jacket closed.
How to measure
- 1. Button or zip the jacket as it would be worn.
- 2. Smooth the body without pulling the lining tight.
- 3. Measure straight across at the pit seam.
Common mistakes
- xMeasuring with the jacket open
- xIncluding sleeve fabric
- xPulling padded fronts taut
Why it matters: Chest determines whether the jacket closes and whether the front hangs cleanly.
Trim
19-20
Close
20-21
Regular
21-22.5
Relaxed
22.5-24
Oversized
24+
Shoulder
Back shoulder width between sleeve head seams.
How to measure
- 1. Turn the jacket face down.
- 2. Identify the sleeve head seam on each side.
- 3. Measure straight across the upper back.
Common mistakes
- xIncluding shoulder padding overhang
- xFollowing a curved seam
- xMeasuring across the front lapels
Why it matters: Shoulder width is difficult to alter and drives the whole silhouette.
Trim
16.5-17.5
Close
17.5-18.5
Regular
18.5-19.5
Relaxed
19.5-20.5
Oversized
20.5+
Sleeve
Outside sleeve length from shoulder seam to cuff.
How to measure
- 1. Flatten the sleeve without forcing the elbow shape.
- 2. Start at the shoulder seam.
- 3. Measure to the cuff edge.
Common mistakes
- xStarting at the collar
- xMeasuring the inner sleeve
- xIgnoring working button cuffs
Why it matters: Sleeves are alterable only within limits, especially on finished cuffs.
Trim
23-24
Close
24-25
Regular
25-26
Relaxed
26-27
Oversized
27+
Length
Back length from collar seam to bottom hem.
How to measure
- 1. Lay the jacket face down.
- 2. Start below the collar at the center back seam.
- 3. Measure straight to the hem.
Common mistakes
- xStarting at the collar top
- xUsing front length on a cutaway jacket
- xMeasuring over folded vents
Why it matters: Length separates cropped casual jackets from classic tailoring proportions.
Trim
24-26
Close
26-28
Regular
28-30
Relaxed
30-32
Oversized
32+
Trousers, denim, fatigues
Pants & Jeans
Bottoms compare best when the waistband, rise, and inseam are measured separately instead of trusting tagged waist size.
Waist
Flat waistband width measured edge to edge.
How to measure
- 1. Fasten the waist closure.
- 2. Align front and back waistband edges naturally.
- 3. Measure straight across and double for circumference.
Common mistakes
- xStretching elastic or denim
- xMeasuring a dipped waistband unevenly
- xForgetting to double flat width
Why it matters: Waist decides whether the garment can be worn without tailoring or belt compensation.
Trim
28-30
Close
30-32
Regular
32-34
Relaxed
34-36
Oversized
36+
Inseam
Inside leg length from crotch seam to hem.
How to measure
- 1. Fold one leg so the inseam is visible.
- 2. Start at the crotch seam intersection.
- 3. Follow the inner seam to the hem edge.
Common mistakes
- xMeasuring outseam instead
- xStarting below the crotch seam
- xIgnoring cuff allowance
Why it matters: Inseam determines break, crop, and whether hemming is enough to rescue the fit.
Trim
26-28
Close
28-30
Regular
30-32
Relaxed
32-34
Oversized
34+
Rise
Distance from crotch seam intersection to top of waistband.
How to measure
- 1. Lay the front rise flat.
- 2. Start at the crotch seam intersection.
- 3. Measure to the top front waistband edge.
Common mistakes
- xUsing back rise without labeling it
- xStarting below the seam intersection
- xPulling the fly into a curve
Why it matters: Rise changes where pants sit and how much room exists through the top block.
Trim
9-10
Close
10-11
Regular
11-12
Relaxed
12-13
Oversized
13+
Thigh
Flat thigh width measured just below the crotch seam.
How to measure
- 1. Lay the leg flat with the inseam visible.
- 2. Start about one inch below the crotch seam.
- 3. Measure straight across to the outside leg edge.
Common mistakes
- xMeasuring too far down the leg
- xPulling pleats open
- xComparing thigh width to circumference
Why it matters: Thigh room is the main comfort check for denim, fatigues, and tailored trousers.
Trim
10-11
Close
11-12
Regular
12-13
Relaxed
13-14
Oversized
14+
Knits, cardigans, sweatshirts
Sweaters
Knitwear moves under tension, so measure relaxed and note whether the fabric has stretch, ribbing, or drop shoulders.
Chest
Relaxed pit-to-pit width across the front of the knit.
How to measure
- 1. Lay the sweater flat and let ribbing relax.
- 2. Measure from pit to pit without stretching.
- 3. Record whether the knit is heavy, ribbed, or elastic.
Common mistakes
- xStretching the knit while measuring
- xIgnoring drop shoulders
- xComparing shrunk wool to tagged size
Why it matters: Sweater chest controls drape and layering room more than the letter size does.
Trim
18-19
Close
19-21
Regular
21-23
Relaxed
23-25
Oversized
25+
Sleeve
Sleeve length from shoulder seam, or from collar on raglan and drop-shoulder knits.
How to measure
- 1. Identify whether the sweater has set-in, raglan, or drop shoulders.
- 2. Measure from the clearest sleeve start point.
- 3. Note the start point in the measurement label.
Common mistakes
- xTreating drop shoulders like set-in sleeves
- xStretching ribbed cuffs
- xHiding the measurement start point
Why it matters: Knit sleeve measurements need context because shoulder construction changes the number.
Trim
22-23
Close
23-24
Regular
24-25
Relaxed
25-26
Oversized
26+
Length
Back length from collar seam or high shoulder point to hem.
How to measure
- 1. Let the hem ribbing relax.
- 2. Start at the back collar seam or high shoulder point.
- 3. Measure straight down without stretching the body.
Common mistakes
- xPulling ribbing to gain length
- xStarting at the top of the collar
- xIgnoring cropped hems
Why it matters: Sweater length controls layering and whether ribbing lands at the waist or hip.
Trim
23-24
Close
24-25
Regular
25-27
Relaxed
27-29
Oversized
29+
Sneakers, boots, loafers
Shoes
Shoes need both marked size and actual length context because brand lasts and international conversions vary.
Shoe Length
Interior or outsole heel-to-toe length when the seller provides it.
How to measure
- 1. Record the marked size exactly.
- 2. Measure insole length when removable.
- 3. Use outsole length only when it is clearly labeled as outsole.
Common mistakes
- xUsing outsole length as insole length
- xConverting size systems without noting the source
- xIgnoring toe shape
Why it matters: Length evidence makes tagged shoe sizes easier to compare across brands and lasts.
Trim
7-8
Close
8-9
Regular
9-10
Relaxed
10-11
Oversized
11+
Shoe Width
Marked width letter or widest usable forefoot measurement.
How to measure
- 1. Record any marked width letter.
- 2. If measuring, use the widest forefoot point.
- 3. Compare against a known comfortable pair from the same category.
Common mistakes
- xIgnoring width letters
- xMeasuring the sole edge instead of usable interior width
- xComparing dress shoes and sneakers directly
Why it matters: Width often explains why the right length still feels wrong.
Note. Width is taken at the widest point — across the ball of the foot — not the toe cap or the heel.
Trim
A/B
Close
C
Regular
D
Relaxed
E
Oversized
EE+
Belts, hats, bags
Accessories
Accessories usually need one decisive usable dimension rather than a full garment profile.
Belt Length
Usable belt range from buckle prong to the adjustment holes.
How to measure
- 1. Start at the buckle prong, not the buckle end.
- 2. Measure to the tightest and loosest usable holes.
- 3. Record the range rather than total leather length.
Common mistakes
- xMeasuring total belt length only
- xIgnoring buckle allowance
- xRecording only one hole
Why it matters: Accessory sizing fails when decorative length is confused with usable fit range.
Trim
28-30
Close
30-32
Regular
32-34
Relaxed
34-36
Oversized
36+
Hat Circumference
Inside band circumference where the hat sits on the head.
How to measure
- 1. Measure around the inside sweatband.
- 2. Keep the tape level and relaxed.
- 3. Record inches or centimeters with the tagged size.
Common mistakes
- xMeasuring outer brim width
- xMixing diameter and circumference
- xIgnoring adjustable closures
Why it matters: Hat fit depends on circumference, not brim or crown dimensions.
Trim
21.5
Close
22
Regular
22.5
Relaxed
23
Oversized
23.5+
Bag Dimensions
Exterior width, height, and depth plus strap drop when relevant.
How to measure
- 1. Measure width across the widest structured point.
- 2. Measure height and depth separately.
- 3. Add strap drop for shoulder and crossbody bags.
Common mistakes
- xCombining depth with width
- xIgnoring strap drop
- xMeasuring collapsed soft bags inconsistently
Why it matters: Bag dimensions decide what actually fits inside and how the bag carries.
Note. All three dimensions are measured at the bag body — never the handles, straps, or opening flare.
Trim
pouch
Close
small
Regular
daily
Relaxed
travel
Oversized
oversize