Seattle Mariners 39THIRTY features a navy crown with the team logo embroidered on the front. Style also features the official MLB logo embroidered to the rear and has a stretch fit for maximum comfort.

How it Works

When you choose Afterpay at checkout, you’ll get the option to shop now and pay later for your purchase. It is easy, safe to use, and you’re always covered by Afterpay's Buyer Protection.

4 Interest-free Instalments

Make your first payment when you purchase today and the remaining amount will be split into 4 payments, payable every 2 weeks. We'll send you reminders, so you never miss a payment. we never charge interest, Afterpay is free when you pay on time. Pay nothing to sign up and no establishment fees, no monthly account fees.

39THIRTY

The 39THIRTY is our premier stretch-fit style available in a variety of sizes. The shape and fabrics are engineered specifically to create a comfortable fit. You’ll regularly see NFL players wearing the 39THIRTY as part of their official sideline kit.

Pre-curved Visor

Curved brim finish straight out of the box

Structured Crown

Rigid structure with internal stiffened fabric linings (called buckram) that holds the cap's shape

High Profile Contoured Crown

Sloping contoured crown silhouette with a closer fit on the front

6 Panels

A crown constructed with six triangular panels and combined in a round shape by the sewing process

Stretch Fit Closure

Closed back style with patented stretch sweatband providing ideal fit and comfort

View more details

CAP SIZE	CAP SIZE	CAP SIZE	CAP SIZE	IN	CM
XS/S				21 5/8	54.9
	S/M			22	55.8
	S/M			22 3/8	56.8
	S/M			22 3/4	57.7
	S/M	M/L		23 1/8	58.7
		M/L		23 1/2	59.6
		M/L		23 7/8	60.6
		M/L	M/L	24 1/4	61.5
		M/L	L/XL	24 5/8	62.5
		M/L	L/XL	25	63.5

How To Measure

CIRCUMFERENCE

Using a flexible tape measure, measure the circumference of your head by placing the tape over the middle of your forehead, just above your ears, and around the widest part of the back of your head.

Be sure not to pull the tape too tightly, as you want your hat to fit comfortably. It's recommended to measure yourself 2-3 times to ensure accuracy. Your head circumference is now determined, and you can reference the size guide above to find your closest matching cap size.

How much does shipping cost?

Spent over $100 AUD? You’ll score FREE shipping. If your order is less than $100, standard shipping costs will apply.

How long will my order take to arrive?

Expect your order to arrive to an Australian address in 5-7 business days with standard shipping. New Zealand customers can expect their orders to arrive within 7-10 business days.

Can I return items and get a refund?

We pride ourselves on our high quality products, however if you’re unsatisfied with your purchase we’ll gladly issue a refund within 30 days of purchase. We’ll even cover the return shipping costs for you!

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Seattle Mariners Official Team Colour

Pre-curved Visor

Structured Crown

High Profile Contoured Crown

6 Panels

Stretch Fit Closure