Serfas TBM-40L Bike Seat
$35.00
In stock
SKU
119487
Size Guide
Not sure what size to get? Let us help you find the perfect fit. We think you’ll find
this guide helpful, but if you still have questions send us an email at
[email protected] or call us at 1-800-123-1234. Your comfort is
our promise.
Not sure what size to get? We think you’ll find this guide helpful, but if you
still have questions send us an email at [email protected] or call us at
1-123-123-1234.
- Women
- Men
- Teen
- Kids
- Footwear
- Dog Pajamas

| Women | ||||||
| Chest | Waist | Hip | ||||
|---|---|---|---|---|---|---|
| XS 0-2 |
32-34 | 26-28 | 35-37 | |||
| S 4-6 |
34-36 | 28-30 | 37-39 | |||
| M 8-10 |
36-38 | 30-32 | 39-41 | |||
| L 12-14 |
39-42 | 33-35 | 42-44 | |||
| XL 16-18 |
43-45 | 36-38 | 44-46 | |||
| XXL 18-20 |
46-48 | 39-41 | 47-49 | |||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Hip: Measure around the fullest part of hips while standing straight with heels together. *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Men | ||||||
| Chest | Waist | Neck | ||||
|---|---|---|---|---|---|---|
| S 36/38 |
36-38 | 28-30 | 14-14.5 | |||
| M 38/40 |
38-40 | 32-34 | 15-15.5 | |||
| L 40/42 |
42-44 | 36-38 | 16-16.5 | |||
| XL 46/48 |
46-48 | 40-42 | 17-17.5 | |||
| XXL 50/52 |
50-52 | 44-46 | 18-18.5 | |||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Neck: Measure around the neck allowing the measuring tape to lay on the neck base comfortably. *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Teen | ||||||
| Chest | Waist | Hip | Height | |||
|---|---|---|---|---|---|---|
| XS 7/8 |
26-28 | 22-24 | 27-29 | 52-54 | ||
| S 9/10 |
28-30 | 24-25 | 29-30 | 55-56 | ||
| M 11/12 |
30-31 | 25-26 | 30-32 | 57-59 | ||
| L 13/14 |
31-32 | 26-28 | 32-34 | 60-62 | ||
| XL 15/16 |
32-33 | 28-30 | 34-36 | 62-63 | ||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Hip: Measure around the fullest part of hips while standing straight with heels together. Height: Measure from the top of the head and pull the tape straight down to the floor. Stand straight with both feet together (bare feet only). *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Kids | |||||||||||
| Chest | Waist | Hip | Inseam | Height | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2T | 20-20.5 | 20-20.5 | 20-21 | 14-15 | 33-35 | ||||||
| 3T | 20.5-21 | 20.5-21 | 21-22 | 15-16 | 35-38 | ||||||
| 4T | 21-22 | 21.5-22 | 22-23 | 16-17 | 38-41 | ||||||
| 5/6 | 22-24 | 22-23 | 23-25 | 17-20 | 41-49 | ||||||
| 7/8 | 24-26 | 23-25 | 25-28.5 | 20-24 | 49-55 | ||||||
| 10/12 | 26-30 | 25-27 | 28.5-32 | 24-28 | 55-60 | ||||||
| 14/16 | 30-33 | 27-30 | 32-36 | 28-30 | 60-63 | ||||||
| How to Measure
Chest: Measure around the fullest part of chest, keeping the measuring tape up under arms and around shoulder blades. Waist: Measure around waist (not over pants) at the natural waistline. Hip: Measure around the fullest part of hips while standing straight with heels together. Height: Measure from the top of the head and pull the tape straight down to the floor. Stand straight with both feet together (bare feet only). *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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| Footwear | ||||||
| Women's | XS 5.5-6 |
S 7-8 |
M 9-10 |
L 10.5-11 |
XL 12-12.5 |
- |
|---|---|---|---|---|---|---|
| Men's | XS 4.5-5 |
S 6-7 |
M 8-9 |
L 9.5-10 |
XL 11-11.5 |
XXL 12.0-12.5 |
Swipe for more →

| Dog Pajamas | ||||||
| XS 8-12 |
Fits Toy Poodle, Chihuahua, Yorkshire Terrier | |||||
|---|---|---|---|---|---|---|
| S 12-16 |
Fits Jack Russell Terrier, Pug | |||||
| M 16-20 |
Fits Beagle, Dachsund | |||||
| L 20-24 |
Fits Schnauzer, Cocker Spaniel | |||||
| XL 24-28 |
Fits Pit Bull, Labrador and Golden Retrievers, German Shepherd | |||||
| How to Measure
Length: Measure your pet from the base of its neck to the base of its tail. Bump up a size if your pet has a thick coat, broad chest, or broad underside. *Size chart is a general guide. It may include sizes that are unavailable for this item. All measurements are in inches unless otherwise noted. |
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Our latest addition to the Tailbones® family introduces a top layer of Memory Foam for a more personalized feel and added comfort.
Serfas Tailbones® saddles supports the sit bones and provides a smooth comfortable ride using Progressive Density Foam while a Deep Groove Design allows maximum blood flow into the neurovascular bundle for drastically reduced numbness and discomfort. A four-way stretch Lycra outer covering wicks away moisture and behaves like a second layer of skin, reducing uncomfortable friction between the rider and saddle.
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