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These extenders buckle onto the existing breastplate straps, adding a couple of extra inches to each side to allow for your original breastplate to be one size larger. Includes one pair of extenders (2 pc.).
Extension strap is 3/4″ wide with buckle on one end.
Compatible with BLD’s Balance Assistance Harness (BAH) and Mobility Support Harness (MSH). Breastplate and harness not included.
If you do not need the complete harness, you may purchase the Mobility Support Harness saddle only here. Choose the support bars to accommodate the handle you will be using on the harness. Keep scrolling for more information below.
*This is the saddle only, not a complete harness. No straps or handles are included.
Turnaround Time up to 10 weeks
NOTE: as of 7/18/2026 we cannot guarantee a turnaround time. We are working through a massive rush of orders with limited staffing and are waiting on specialty components to be delivered. Orders will be completed as soon as we are able, timeframe may be as late as September, 2026. Thank you for your understanding.
Please see the Mobility Support Harness™ listing for details about this item.
- The standard support bars accommodate handles heights of 8″ or less (the metal on the handlebar must be 1/8″ thick to fit)
- The tall support bars accommodate any size handle (these bars are heavy 1/4″ thick metal designed for tall handles over 9″)
- Pull-Rings are available for people with limited dexterity who have trouble grasping a small knob, pull-rings can be added to make it easier to operate the handle folding mechanism.
- Magnetic Latch option for those with very limited dexterity
Saddle size and support bars/handle mounts cannot be changed after the saddle is constructed.
Size
MSH Harness Size:
Standard - For most dogs 60-110 pounds, with a girth size of 28-36 inches that are 21 inches or taller measured at the withers. Best choice for most German Shepherd Dogs and Belgians, retrievers, smaller Great Pyrenees, and larger standard poodles and doodles.
Intended for dogs 60 pounds or larger.
Extra Large - For most dogs 100-170 pounds, with a girth size of 34-42 inches that are 26″ or taller. Best choice for most Newfoundland dogs, large Great Pyrenees, Larger Bernese Mountain Dogs, larger Rottweilers, smaller Great Danes, etc.
Giant - For dogs that meet or exceed a minimum of 150 pounds, a girth of 40 and 12 inch width. Best choice for larger Great Danes, Mastiffs, etc. If not all three minimums are met, choose XL.
We do have a XXL for dogs that fall between XL and giant size; this size is rare, and only available by custom order. It is the same price as a giant. All straps from the XL size fit the XXL saddle. Giant straps do not.
The chart below can help you determine the harness size you need. Weight and girth measurement are the most important.
ABSOLUTE MINMUM SIZE REQUIREMENT: This harness will NOT fit dogs that are smaller than the minimum recommended 45 pounds, 21inches tall, or with a girth size less than 28 inches.
Color
Harness color:
- Black: Solid black latigo leather is our standard offering. This leather wears beautifully over time, does not fade, and hides the appearance of scuffs and scratches
- London Tan: Gorgeous vegetable-tanned Bridle leather. Color and shades will vary; each part of harness may be a different shade. Tan leather naturally appears rustic and may show scuffs and wear over time; color may darken with use over time.
Turnaround Time up to 8 weeks
NOTE: as of 7/18/2026 we cannot guarantee a turnaround time. We are working through a massive rush of orders with limited staffing and are waiting on specialty components to be delivered. Orders will be completed as soon as we are able, timeframe may be as late as September, 2026. Thank you for your understanding.
If you do not need the complete harness, you may purchase the Balance Assistance Harness™ saddle only.
This is not a complete harness. No straps or handles are included. Please note that the saddle size and handle mounts cannot be changed after the saddle is constructed.
Turnaround Time up to 10 weeks
NOTE: as of 7/18/2026 we cannot guarantee a turnaround time. We are working through a massive rush of orders with limited staffing and are waiting on specialty components to be delivered. Orders will be completed as soon as we are able, timeframe may be as late as September, 2026. Thank you for your understanding.
Please see the Balance Assistance Harness™ listing for details about this item.
Size
MSH Harness Size:
Standard - For most dogs 60-110 pounds, with a girth size of 28-36 inches that are 21 inches or taller measured at the withers. Best choice for most German Shepherd Dogs and Belgians, retrievers, smaller Great Pyrenees, and larger standard poodles and doodles.
Intended for dogs 60 pounds or larger.
Extra Large - For most dogs 100-170 pounds, with a girth size of 34-42 inches that are 26″ or taller. Best choice for most Newfoundland dogs, large Great Pyrenees, Larger Bernese Mountain Dogs, larger Rottweilers, smaller Great Danes, etc.
Giant - For dogs that meet or exceed a minimum of 150 pounds, a girth of 40 and 12 inch width. Best choice for larger Great Danes, Mastiffs, etc. If not all three minimums are met, choose XL.
We do have a XXL for dogs that fall between XL and giant size; this size is rare, and only available by custom order. It is the same price as a giant. All straps from the XL size fit the XXL saddle. Giant straps do not.
Need help with sizing? Don’t hesitate to ask! Contact us. We’ll take a look at your dog’s measurements to be sure you get the right size (before or after you place your order).
The below chart can help you determine the harness size you need. Weight and girth measurement are the most important.
ABSOLUTE MINMUM SIZE REQUIREMENT: This harness will NOT fit dogs that are smaller than the minimum recommended 45 pounds, 21inches tall, or with a girth size less than 28 inches.
Color
Harness color:
- Black: Solid black latigo leather is our standard offering. This leather wears beautifully over time, does not fade, and hides the appearance of scuffs and scratches
- London Tan (add $20): Gorgeous vegetable-tanned Bridle leather. Color and shades will vary; each part of harness may be a different shade. Tan leather naturally appears rustic and may show scuffs and wear over time; color may darken with use over time.
Turnaround Time up to 10 weeks
NOTE: as of 7/18/2026 we cannot guarantee a turnaround time. We are working through a massive rush of orders with limited staffing and are waiting on specialty components to be delivered. Orders will be completed as soon as we are able, timeframe may be as late as September, 2026. Thank you for your understanding.
The Support Pull handle requires 4 points of contact to properly distribute pressure. These mouse ears are needed to alighn and stabilize the handle.
Mouse ears mount to the saddle via the accessory D-rings. This kit installs easily with a screw driver.
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Built for Performance. Maintained with Care.
Every BLD harness is handcrafted for lasting comfort and support. With replaceable handles, straps, and hardware, your gear stays dependable through years of service and everyday use.
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