Had to have some alterations done to my ao dai for my wedding. It was hemmed amazingly well, and…read moreshe made the sleeves smaller so they wouldn't fit loosely. Loved the quality of work so I brought my fiancé back to get some other things altered a week later. We got a pair of leggings hemmed and a pair of his hiking pants made into shorts. Picked them up today and loved that the stitching patterns and thread matched the what had already existed. Will have all my future alteration needs handled here. Price was fair as well.

I always go to My when I need anything altered. I've gotten event dresses altered here and she…read moretakes great care of my clothes and she works quickly too. I can't compare pricing to other places as this is the only business I've been to for these services, but it never breaks the bank and she accepts different payment methods. Her hours are limited but with the amount of people that pick up and drop off clothes when I'm there, it makes sense why. And if you're lucky you might get a visit from her puppy as well :) Only reason I dropped a star is that it's a tight space when there are several people there.

Great job on prom dress altering. Recommend... lady is nice ...and funny lol price was reasonable…read moreas well.

I can't say enough great things about Vincent's Tailoring…read more Very friendly, great turn time and very reasonable. Give them a try you will not be sorry

I had a sports jacket altered, a shirt altered, and a pair of pants altered…read more All were completed promptly at a reasonable price. The work was top-notch, and the service was friendly and accommodating. I will continue to bring my tailoring to these ladies. They did a great job.

I have been coming here since I was in highschool... I have long since graduated & still come here…read moretill this day whenever I need an alteration. Over the summer the tailored a vacation dress that was much too long for my short self & just today picked up a pair of jeans that also were too long/big on me. Very happy with the time it takes to complete the alteration as well as the work itself. Thank you always

I've been here a few times since 2019. From what I can recall,…read more - Spring 2019: I needed a few adjustments for my graduation dress. Needed to tighten the waistline and I also wanted to trim the dress length so it'd reach the top of my knee - Late October 2025: I got my Maid of Honor dress altered here! Unfortunately, I had very vague ideas of what I wanted. No more than 10 mins on the fitting platform and this gentleman was able to piece together alterations I was extremely happy with when I had to wear this dress less than a month later. - April 2026: I got 2 of my new trousers hemmed here. I had pants from Banana Republic and Aritzia that fit well for my waist, but I needed to shorten the length for the pant legs. Although there's a bit of a language barrier, this man is extremely talented and a local treasure to the Diamond Bar community. I no longer live in the area, but he's worth the drive from the South Bay for PERFECT alterations. Most places have drastically increased their rates because of the pandemic, but I've never quarreled with the owner of Diamond Bar Tailoring. Fair prices for absolute phenomenal work!! He may not have the 5-star rating on Yelp he did back then in 2019, but he's always been consistent and great with managing his time/customer expectations. I have a deep respect for his craft and genuinely give him a "10/10 a would recommend."

Twice, I needed rushed alteration right before an event, and he was so accommodating. Not only were…read morethe repairs flawless, but the pricing were very fair. It's hard to find honest, skilled work like this these days. I won't be going anywhere else from now on.

Reasonable cost, nice lady, fast service and GREAT work on a prom dress!!! The place is a bit hard…read moreto find but just walk around the indoor space and you will find it.

I came by here on a whim. I live in San dimas and went to one place nearby. They quoted me $85 to…read morehem a dress which I thought was insane. I was running errands and found this place with five stars, so I just headed over there with my dress and my shoes. It was a little hard to find once I got inside, but the security guard was really nice and pointed me in the right direction. Once I got there, the process was super easy...I tried on my dress... she put the pins in my dress. I took it off and anticipated being ready in a few days. Nope she asked if I could pick it up next day, which was amazing. It came out beautiful, and it was $50 to hem. I'll be coming back for sure. If you've never been to this area, it's a little rough around the edges, with that said the people are super kind, really helpful, and give you a great deal. Oh and just fyi it's inside an indoor swap meet.

5* quality work I went from a size 3X out, and Maria brought my clothes down to a medium fitted…read moreEuropean style, which never thought I would ever fit in my life.

Very rude. Called to ask questions and was interrupted mid sentence and told they can't tell me…read moreanything over the phone. I understand not being able to give full quote but I was also trying to ask other important questions and she said bye without answering any

The owners are very professional man. This quality work finishes them on time and it's very…read morereasonable priced.

This is an immaculate tailor shop…read more The owner was very friendly and honest, advising me that it was best to purchase a new coat rather than having it tailored to my recent weight loss. It would save me money, which is how the owner explained it to me. Thank you for taking the job and then charging me an arm and a leg for the work. The owner advised that appointments are required in the future to have work completed in his shop

Goodness gracious! What a grumpy rude man! Unfortunately my experience was very similar to many…read moreother reviews! I just asked about their service and he was very defensive and rude for no reason. I decided to just leave. Totally unnecessary.

Stay away from this place, owner couldn't care less. Took stained clothes, he took them in with no…read moreproblem. No stains came out. I asked for a credit, he would not give a discount because they "still did the work." Completely unprofessional with an attitude. Stay away.

Z-Express is incredible! I was in a total bind and needed a dress shortened for a wedding in under…read more48 hours. They immediately told me "no problem," had me come in right away, and finished everything in less than 20 hours. They even steamed and pressed the dress, which was such a nice touch--it was completely ready to go! I'm so grateful for their help and will definitely be back. Highly, highly recommend!

I need a suit done in a rapid turnaround and Fahim was very professional and kind! Accommodated my…read moreneeds and exceeded my expectations! Great price and exceptional value!

If you are looking for the best alteration service in Walnut, look no further than Couture on…read moreGrand. I recently came here for alterations and had a wonderful experience. Shirlin is truly amazing--her skills are top-notch, and she provides genuine, personalized service that makes you feel like a valued customer rather than just another order. The process is also very convenient; they send a text notification the second your items are ready for pickup. It's rare to find such a perfect blend of high-quality craftsmanship and modern efficiency. Highly recommended!

I took my brand new dress to the dry cleaner, and it came back with several oily stains. Initially,…read morethey told me I should return the dress because they claimed the material was problematic but they never mentioned anything about stains. I only discovered the stains after they kept saying that I should return it, which raised my suspicion. I brought it back and they said they could wash it again with water. After the wash, the stains were little less but still not completely removed. The lady there was not honest and kept blaming the dress's material for the stains. I told her the dress was brand new and had no stains when I brought it in. Please be cautious about this store. I plan to file a report with the BBB to warn others about this incident.