It sounds like you're describing a meticulously designed and crafted apron along with a chain collar for a special garment or uniform. The detailed description you've provided includes various materials, measurements, and design elements. It appears to be a high-quality item with intricate embroidery and premium materials.

Here's a summary of the key features:

1     Apron:

       Material:Heavy white artificial leather and blue velvet.

        Embroidery:** Hand-embroidered with gold bullion wire and blue silk thread.

        Size:** 14 x 16 inches (excluding fringe).

        Trim:** Blue velvet border, 5 cm wide, trimmed with quarter-inch gold metallic braids.

        Fringe:** 4 cm wide gold bullion fringe on all sides and flap.

        Lining:** Good quality blue polyester fabric lining on the backside with a pocket.

        Waist Belt:** Long blue polyester belt with a gold-colored metal snake fastener suitable for waistlines up to 135 cm.

2.    Chain Collar

       Material:  Gold-colored metal.

        Design:   Crafted with a blue velvet backing and a central gold-colored chain.

The level of detail and craftsmanship in this item seems to be quite intricate and of high quality. It appears suitable for ceremonial or formal purposes due to its ornate design and premium materials.

If you're looking for more information or assistance regarding this item or something related, feel free to ask!