Introduction
If you struggle to find jeans that fit perfectly on the waist, use this guide to alter the waist of jeans with a simple sewing method.
In step 4 of this guide, you will need to use a needle threader. For more detailed information on using a needle threader, follow the instructions on How to Use a Needle Threader.
Tools
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            Pass the thread through the loop on the needle threader. 
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            Pull the needle threader out of the eye of the needle and create a knot at the end. 
 
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            Begin sewing from the inside out, starting beside the belt loop. 
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            Bring the needle across the marked spot and sew it inside out. 
 
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            Move the needle horizontally, then insert and thread it through the fabric a short distance below the starting point. 
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            Repeat this process until the thread reaches the centre back seam. 
 
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To reassemble your device, follow these instructions in reverse order.