Our trusty 10 year old Ikea Pello armchair badly needs a new cover, but the price (starts from $50 for the most basic fabric design) made it difficult for me to decide, when I see a brand new Pello costs only $69.

Since there was nothing really wrong with the frame structure, I decided to sew the cover myself.  I found some ready-cut felt cloth (70cm x 60cm) in gray (I used four) and a ball cotton lace yarn in matching color within the craft section of Daiso. Total bill came up to just $10.
Here’s my plan to put the 4 pieces of felt together.

I kept the original cushion + cover inside as stuffing.  I hand-sewn the entire thing with back stitch, did not take too long as there was no cutting, or detailed measuring required.  The dimension of the ready cut felt cloths fits wonderfully well, and the cover was still removable for washing (or replacing) in the future.