Thank you for viewing! m(__)m This is a collar for small to medium-sized dogs made with paracord. With the safety of your precious pet as our top priority, the cord is made in the USA by ATWOOD, 550LB/7Strand Core (4mm 7-core, load capacity 250kg), the buckle is a safe 15mm, and the collar rings use two gold D-rings with an inner diameter of 12mm. *We accept orders for collars with an inner circumference of 18-25cm. Please measure your dog's neck circumference with a measuring tape or paper tape and let us know in the comments. ◆Policy *The cord that forms the axis of the 15mm buckle and rings is passed through four times, making it extremely sturdy. *To prevent the risk of cord breakage or unraveling, we do not use any joints (connecting the cords by burning them). *All rings used are pet-specific and seamless. *By weaving the cord while applying a constant tension, we minimize the "stretching" of the cord. *Because it is woven tightly, it may feel stiff at first, but it will gradually soften with use. *To ensure that customers can receive their products with peace of mind, we will disinfect the products before shipping. ◆Caution *Due to the nature of paracord, it may stretch slightly. If the collar comes off your dog's neck, discontinue use immediately. *Do not use the collar if the buckle is cracked. *Keep away from fire.