Elasticated Relaxed Fit Trousers - Barbarian Cosmic
- Pyjamas that are too good to keep indoors!
- Cosmic is a limited edition colourway. *No restocks of this one*
- Like us, our sizing is Irregular - it's the slow fashion way but we're here to help 💚
Learn more

Elasticated waist with adjustable drawstring

Deep side pockets with twin needle stitching

Wide leg
About Elasticated Relaxed Fit Trousers - Barbarian Cosmic
With twin needle stitching, our GOTS organic cotton relaxed fit PJ trousers feature a generous volume of fabric in the leg, are designed to be slightly cropped at the ankle, have no fly, side pockets and a wide elasticated waistband, all resulting in a beautiful comfort fit.
Sizes 5, 6 and 7 feature a gusset for extra relaxed movement.
The organic cotton across our pyjamas, nightshirts + robes is pre-shrunk (so won't shrink further) and can be washed at up to 40 °C. We recommend washing at 30°C with similar colours
Size Guide for Elasticated Relaxed Fit Trousers - Barbarian Cosmic
Why is our sizing so confusing? Click here for a 60 second video from Jolene
We use custom sizing for our sleepwear, so be sure to check our detailed size charts. For the best fit, grab a tape measure and measure both your waist and the widest part of your bottom/hips.
Our elasticated wide legged trousers are designed to be worn loose + low, and feature robust elastic that won't twist after one wear, as well as a drawstring. The elasticated trousers are longer in the leg that our high waisted (which are designed to be ankle skimming). All our trousers have been constructed with a 10cm internal cuff at the hem which can be let down for extra length, or of course turned up...
We also recommend browsing our joyful BODY LIBRARY, created to show our products on a range of bodies, one of which might look a bit like yours.
If in doubt, please get in touch - we will be delighted to help.
This size chart is based on body measurements and includes a comfort allowance for fit. For exact garment measurements, please see the 'Garment Size' page above.
Waist Circumference (max) | Hip Circumference (max) | UK Women | UK Men | |
---|---|---|---|---|
Size 0 | 68cm | 88cm | 6 | XXS |
Size 1 | 73cm | 96cm | 8-10 | XS |
Size 2 | 79cm | 102cm | 10-12 | S |
Size 3 | 89cm | 110cm | 12-14 | M |
Size 4 | 99cm | 117cm | 16-18 | L |
Size 5 | 109cm | 132cm | 18-20 | XL-2XL |
Size 6 | 119cm | 147cm | 20-22 | 2XL-3XL |
Size 7 | 129cm | 151cm | 22-24 | 3XL-4XL |
This size chart is based on body measurements and includes a comfort allowance for fit. For exact garment measurements, please see the 'Garment Size' page above.
Waist Circumference (max) | Hip Circumference (max) | UK Women | UK Men | |
---|---|---|---|---|
Size 0 | 27" | 34.5" | 6 | XXS |
Size 1 | 29" | 37.5" | 8-10 | XS |
Size 2 | 31" | 40" | 10-12 | S |
Size 3 | 35" | 43" | 12-14 | M |
Size 4 | 39" | 46" | 16-18 | L |
Size 5 | 43" | 52" | 18-20 | XL-2XL |
Size 6 | 47" | 58" | 20-22 | 2XL-3XL |
Size 7 | 51" | 59.5" | 22-24 | 3XL-4XL |

A - Chest / Bust
The chest size is measured around widest point of chest / bust
B - Waist
The waist size is measured around the narrowest part of the waist
C - Hip
The hip measurement is taken from the widest part of the hip
D - Inside Leg
The inside leg measurement is taken from the crotch to the floor
The following size chart shows the actual garment measurements (not body measurements) to help you find the best fit. For sizing advice based on body measurements, please refer to the 'Body Size' page above.
Waist Circumference stretched | Waist Circumference relaxed | Hip Circumference | Inseam length | UK Women | UK Men | |
---|---|---|---|---|---|---|
Size 0 | 89cm | 62cm | 102cm | 64cm | 6 | XXS |
Size 1 | 97cm | 64cm | 108cm | 66cm | 8-10 | XS |
Size 2 | 103cm | 76cm | 119cm | 68cm | 10-12 | S |
Size 3 | 111cm | 78cm | 130cm | 70cm | 12-14 | M |
Size 4 | 118cm | 80cm | 137cm | 70cm | 16-18 | L |
Size 5 | 133cm | 86cm | 144cm | 70cm | 18-20 | XL-2XL |
Size 6 | 148cm | 92cm | 148cm | 70cm | 20-22 | 2XL-3XL |
Size 7 | 152cm | 100cm | 152cm | 70cm | 22-24 | 3XL-4XL |
The following size chart shows the actual garment measurements (not body measurements) to help you find the best fit. For sizing advice based on body measurements, please refer to the 'Body Size' page above.
Waist Circumference stretched | Waist Circumference relaxed | Hip Circumference | Inseam length | UK Women | UK Men | |
---|---|---|---|---|---|---|
Size 0 | 35" | 24.5" | 40" | 25" | 6 | XXS |
Size 1 | 38" | 25" | 42.5" | 26" | 8-10 | XS |
Size 2 | 40.5" | 30" | 47" | 27" | 10-12 | S |
Size 3 | 43.5" | 30.5" | 51" | 27.5" | 12-14 | M |
Size 4 | 46.5" | 31" | 54" | 27.5" | 16-18 | L |
Size 5 | 52" | 34" | 56.5" | 27.5" | 18-20 | XL-2XL |
Size 6 | 58" | 36" | 58" | 27.5" | 20-22 | 2XL-3XL |
Size 7 | 60" | 39" | 60" | 27.5" | 22-24 | 3XL-4XL |
Delivery & Returns
Delivery
- Free Delivery in UK over £100
- Under £100 in UK £4.19 Royal Mail tracked 48 2-3 working days
- Under £40 in UK £2.30 Royal Mail second class 2-3 working days
- £12 express delivery (DHL) in UK 1-2 working days
- USA, Japan, Australia, New Zealand, shipping is free for orders over £200
- Otherwise $27 economy shipping to USA, Canada, Japan via Royal Mail 10-20 days*
- Express shipping to USA with DHL is $41 2-3 working days*
- Express shipping to Australia, New Zealand & Japan available for £50 3-5 working days*
* can vary based on customs clearance delays
- Customers in Europe: We are still having issues and are working on a solution.
- International Shipping to rest of the world: please contact us for a quote
- NB: For International Orders, please note that depending on your order and country, you may be liable to pay local taxes and duties on receipt of your order, for which we cannot accept liability. The refusal of payment of such fees causes a full cancellation of the order. Transportation cost and custom clearance cost associated with a cancellation will be deducted from the amount refunded to you.
Returns
- Size exchanges within the UK are free of charge. Please head to our returns portal. Returns will incur a £4 fee which will be deducted from your refund.
- You have 28 days from receipt of goods to return your garment(s) to us. Items should be returned new, unused, FOLDED and with all tags attached and in original packaging. Please note that after 28 days, we are only able to offer an exchange or credit note. Unfortunately, we cannot process refunds for any items returned outside of this time frame.
- If you are overseas please be aware that returning a garment will be very expensive, and we don’t cover the cost of sending out a replacement in the case of exchange, so please check in with us on sizing before you make your purchase!
- If there is a fault with your garment, please get in touch and we will resolve the issue.
I've recently placed my first few orders with ISP, (pairs of trousers and king size duvet set) and I'm delighted with the products, and the helpful advice. Lots of wonderful styles and colours (ok... I'm still a 50 shades of blue lassie!!!), so will definitely be buying more.
Saw staff jackets at Jupiter Artland and had to get myself my own one.
I love my blue cosmic barbarian! It’s comfortable and cool, and too good for just bedtime! Planning my next one soon. Thank you!
Always beautifully made and striking appearance. Thank you for the note and the little zip up bag - it’s lovely . I now have every jacket you have made ! X
I love everything about these pyjamas! The Barbarian design is wonderful, the quality of the material is very good and the stitching is beautifully done. So comfortable to wear. What a treat! Perhaps these are the only two items of clothing I'll ever need again. Bed-wear, house-wear, everyday-wear. The only downside is that you have to take them off to wash them.
I bought the cosmic print sleep suit. The fit is great- I like the high waist and button fly and the workwear style jacket. Good cotton and I’m happy wearing it in bed and around the house.