Are medium t shirts in the USA the same size medium shirts in the UK? How different are the sizes?

Is a medium shirt in the USA the same size as a medium shirt in the UK? If they are different, then what is the difference?

Clothes sizes are a size or so bigger in US as in the UK. Therefore your medium in the US would be closer to a large in the UK.

CHICO'S DESIGN Red Brocade Shirt Blouse SIZE MEDIUM $9.99

5 Pound Med Size Flat Rate Box of Civil War Scraps $12.48

GONZALEZ ROCKIES AUTHENTIC JERSEY COOL BASE SZ MED NEW $19.99

Womens sweater size medium $3.00

DALE EARNHARDT COTTON UNIFORM JACKET SIZE MEDIUM NWT $75.00

2 Ladies Mossimo Athletic Jacket and Pants Size Medium $15.99

T co. Off White CAMISOLE.. SIZE: Medium..New w/tags $3.00

CHRISTIE BROOKS GIRLS SIZE MED 10 / 12 PLAID DRESS $6.49

2 NEW GREEN CAMOUFLAGE CAMO TANK TOPS SHIRTS SZ MEDIUM $6.99

JAGERMEISTER GRAY T-SHIRT NEW SIZE MED. $2.99

HARLEY DAVIDSON Motorcycle Print S/L Blouse Sz MED 8/10 $9.99

CYNTHIA STEFFE WOMENS SUIT JACKET SZ MED AND SKIRT SZ 4 $33.99

Rolling Stones Bigger Bang Tour T-Shirt Size Medium $9.50

M25-6 Med sz Bakelite w/Back Shanks Buttons $11.00

IZ Byer Juniors Size Medium Shirt $1.00

NWT *ABERCROMBIE & FITCH* V NECK SWEATER SIZE MEDIUM $11.50

$440 ALICE + OLIVIA BEADED GOWN DRESS SZ MEDIUM NEW NWT $120.00

NWT Women's Winter Down Ski Jacket coat 2 Sizes MED LAR $31.99

OLD NAVY BIB JEAN SHORTALL OVERALL WOMEN SIZE M MEDIUM $5.00

Roxy Sweatshirt Hoodie Sz 5-7 Med Logo Print Zip-up NEW $22.99

size 10 medium-2 PAIR KEDS - fabric upper - rubber sole $4.99

Gap Kids T-shirt Lot Size Medium M 8 $6.57

FREE PEOPLE FLRL CROP JACKET COAT TOP SZ MEDIUM NEW NWT $35.00

Athleta navy capris athletic pants womens sz medium $14.99

SINFUL AFFLICTION MEDIUM SHIRT + SANDALS SZ 8 $34.99

Womens OLD NAVY Blouse Size Medium $7.00

BAIL Snap 6mm 1/4" - med size - Silver Plated - 48 $3.52

Mens HIGH SIERRA Shirt Size Med =^..^=CatRescue $0.01

NEW ABERCROMBIE & FITCH JACKET SIZE MED, SUPER CUTE!!! $4.99

J Crew Ethereal Ruffle Sweater NEW Size Medium Lavender $44.00

Womens coat size medium Brown long Forecaster ladies M $3.99

Girls Clothes Shirt size 7 8 7/8 M Medium Spring Summer $28.99

Talbots Jean Shorts Size 12 *Medium Wash* $5.99

New Baby Phat Size Medium Tube Top/Shorts White NWT $65 $24.99

Ralph Lauren Shirt/Dress Destroyed look Sz Medium NWT $9.99