Size Guide
At seventy + mochi, we’re always evolving to create the best possible fit. We conducted an in-depth sizing workshop and carefully listened to customer feedback to refine our measurements. From the Spring 2025 collection onward, we've updated our sizing chart to best reflect these thoughtful adjustments, ensuring a more comfortable and consistent fit across our collections.
To figure out your size, measure yourself around the waist and hip as tight or as relaxed as you would want your jeans to fit. While denim with stretch gives a little, they hold their shape with wear. Denim with no stretch in it will relax around your body with wear so should fit a little more snug on first try.
Our fit model is 5'6 / 167cm and is a regular inseam. Each jean or jumpsuit will be fitted to sit either full length or cropped to low ankle or high ankle on this inseam. Please read the each product description for specific information on that fit.
We are adding more sizes and different inseams as we grow. Please sign up to our newsletter here to be the first to learn about exciting brand news!
Below, you will find our new sizing charts, a conversion chart, and our old sizing chart for reference.
SPRING 2025 ONWARD: GENERAL SIZING CHART
| ALPHA SIZE | DUAL SIZE | BUST (CM) | WAIST (CM) | HIPS (CM) |
| XXS | XXS/XS | 74.5-79.5 | 56.5-61.5 | 81.5-86.5 |
| XS | XXS/XS | 80-85 | 62-67 | 87-92 |
| S | S/M | 85-92.5 | 67-74.5 | 92-99.5 |
| M | S/M | 93-99 | 75-81 | 100-106 |
| L | L/XL | 99.5-106 | 81.5-88 | 106.5-113 |
| XL | L/XL | 106.5-113.5 | 88.5-95.5 | 113.5-119.5 |
SPRING 2025 ONWARD: JEANS SIZING CHART
For more information on inseam length, please read each product description
| SIZE | WAIST (CM) | HIPS (CM) | SHORT LEG (CM) | REG. LEG (CM) |
| 24 | 59-61.5 | 85-86.5 | 76 | 81 |
| 25 | 61.5-64 | 86.5-89 |
76 |
81 |
| 26 | 64-66.5 | 89-91.5 |
76 |
81 |
| 27 | 66.5-69 | 91.5-94 |
76 |
81 |
| 28 | 69-71.5 | 94-96.5 |
76 |
81 |
| 29 | 71.5-74 | 96.5-99 |
76 |
81 |
| 30 | 74-76.5 | 99-101.5 |
76 |
81 |
| 31 | 76.5-79 | 101.5-104 |
76 |
81 |
| 32 | 79-81.5 | 104-106.5 |
76 |
81 |
| 34 | 81.5-86.5 | 106.5-111.5 |
76 |
81 |
| 36 | 86.5-91.5 | 111.5-116.5 |
76 |
81 |
CONVERSION CHART
| ALPHA | JEANS (W) | US | UK | FRA | GER | ITA | AUS |
| XXS | 24 | 0/2 | 4/6 | 32/34 | 30/32 | 36/38 | 4/6 |
| XS | 25-26 | 2/4 | 6/8 | 36 | 32/34 | 38/40 | 6/8 |
| S | 27-29 | 6/8 | 10/12 | 38/40 | 34/36 | 42/44 | 10/12 |
| M | 30-32 | 8/10 | 12/14 | 40/42 | 40 | 44/46 | 12/14 |
| L | 34-36 | 12/14 | 16/18 | 44/46 | 42 | 48/50 | 16/18 |
| XL | 36 | 14/16 | 18/20 | 46/48 | 44 | 50/52 | 18/20 |
| UK SIZE | ALPHA SIZE | DUAL SIZE | BUST (CM) | WAIST (CM) | HIPS (CM) |
| 6 | XS | XS/S | 78-80.5 | 59-62.5 | 85-87.5 |
| 8 | XS-S | XS/S | 80.5-84.5 | 62.5-66.5 | 87.5-91.5 |
| 10 | S | XS/S | 84.5-89.5 | 66.5-71.5 | 91.5-96.5 |
| 12 | M | M/L | 89.5-94.5 | 71.5-76.5 | 96.5-101.5 |
| 14 | M-L | M/L | 94.5-99.5 | 76.5-81.5 | 101.5-106.5 |
| 16 | L | M/L | 99.5-104.5 | 81.5-86.5 | 106.5-111.5 |
| 18 | XL | XL/XXL | 104.5-109.5 | 86.5-91.5 | 111.5-116.5 |