Most orders are made using in-stock fabrics from wholesalers and mills.
Due to the time gap when the fabrics are purchased for sample and production, there may be some tonal (1-2 shades darker or lighter) difference in colour and fabric weight (+/- 10%).
This is due to fabrics being produced, dyed & processed in different batches. This also applies to custom dye jobs as the fabric bought for samples and production may be from different production batches.