Jessie James Decker shows off her small waistline in a teeny bikini... after losing weight following the birth of her 4th child

Jessie James Decker posed in a bikini in new images posted to Instagram on Wednesday.

The 36-year-old Kittenish founder is looking better than ever after welcoming her fourth child, a son named Denver, with husband Eric Decker.

The country singer was announcing a new partnership.

'Excited to announce that I am teaming up with @sunhomesaunas to give a lucky winner the same sauna that I have at home,' wrote the star as she was seen in a sauna.

'The sauna has been a vital part of my workout recovery routine and has helped reduce pain and inflammation and I can’t wait to get one of these to our winner!

Jessie James Decker posed in a bikini in new images posted to Instagram on Wednesday

Jessie James Decker posed in a bikini in new images posted to Instagram on Wednesday

She is looking better than ever after welcoming her fourth child, a son named Denver, with husband Eric Decker

She is looking better than ever after welcoming her fourth child, a son named Denver, with husband Eric Decker

'How to enter: 1. Like this post 2. Must follow @sunhomesaunas and me 3. Tag three friends (who must be following) that would love this 4.

'Giveaway ends August 4! Good luck everyone!' she also wrote.

This comes after she was seen in new images shared with DailyMail.com on Friday for her collaboration with DIFF Eyewear.

The Instagram favorite looked busty in both a black top and an ivory vest. 

'This is actually the very first time we have designed together,' she said of working with DIFF.

'All the other collaborations have been me being sent designs and me being like, "Hey that feels like me."

'But this time, I wanted to really have a massive hand in the sunglasses so that they felt extremely authentic to me.'

The country singer was announcing a new partnership. 'Excited to announce that I am teaming up with @sunhomesaunas to give a lucky winner the same sauna that I have at home,' wrote the star as she was seen in a sauna'

The country singer was announcing a new partnership. 'Excited to announce that I am teaming up with @sunhomesaunas to give a lucky winner the same sauna that I have at home,' wrote the star as she was seen in a sauna'

Jessie is pictured in a Kittenish bikini in 2024
Jessie is pictured at her goal weight in 2023

The mother of four maintains she looks to lose 30 lbs to get back to her pre-baby weight

This new collection includes sunglasses, blue light, and prescription glasses.

There are cat eye prescription glasses and European-inspired acetate frames.

The collection includes 15 new styles with prices ranges from $98 - $119 and will be available via diffeyewear.com beginning Friday.

On Instagram Jessie shared: 'I’m back, y’all! Get ready to shop my new and chic Jessie James Decker x DIFF styles on 07.26.24! Plus, when you sign up now, you’ll get early access to shop my shades first!'

This comes after she said in May that she is shy about modeling bikinis again for her clothing brand, Kittenish, which launched in 2014.

'I'll be honest I really didn't wanna post any of these kittenish swim photos because I weigh 30 pounds more right now than I did last year this time,' she revealed in an Instagram post.

She added, 'Yes I know I just had a baby three months ago but it's easy to compare on here and wonder why my body likes to hold on to it more than others.'

The Lose Control star maintains the entire family, including their three other kids: Vivianne, 10, Eric II, eight, Forrest, six, are already 'so in love with their new baby brother' Denver, since he arrived on February 9, as reported by Us Weekly.

This comes after she was seen in new images shared with DailyMail.com on Friday for her collaboration with DIFF Eyewear

This comes after she was seen in new images shared with DailyMail.com on Friday for her collaboration with DIFF Eyewear 

In the first photo, Decker (born Jessica Rose James), 36, can be seen flashing a smile while standing next to the side of the pool in knee-high water.

Having already taken a swim, she rocked the wet, slick back look with her dark brown locks pushed back off her face and down to the middle of her back.

The other picture of the post showed a wider look of the outdoor setting seemingly at the couple's sprawling home in the Oak Tree neighborhood of Nashville, Tennessee.

The singer-songwriter says she's actually using these new photos as a sort of motivation to not get caught up in the numbers games when it comes to body weight and shape.

'The pressure we put on our self is not realistic,' she explained in the post, before adding. 'So this is a reminder to myself and to you.'

In a question-and-answer with Instagram fans and followers, the mother of four was asked what she's striving for in terms of weight? 

'I have 30lbs to lose to get back to my pre baby body!' she disclosed. 'I always gain a lot during pregnancies and I hold on to it until I'm done breastfeeding.'

She explained, It's just what my body does and I've accepted it! I have started back working out getting stronger and toning until I can drop the baby weight!'

Decker also made a point to direct a message to her fellow new moms 'to be kind to yourself' and 'give yourself grace. We are healing after growing a human being for nine months.'

She continued, 'And if you're breast-feeding like me and your body needs to hold on to as much weight as possible to keep making milk, then let it. Focus on that sweet new baby because that's what it's all about. Plenty of time to "get back" when it’s time. But for now. Give yourself grace… you're doing great and you got this girl!' 

Kittenish was founded in 2014 by the platinum singer-songwriter, who also just happens to be a television personality and best-selling author.

Being the busy mom, wife and country music star, Decker had been debating on when she should add entrepreneur to the resume and take the plunge on the first Kittenish store. 

The singer seen with her husband Eric and three of their four children

The singer seen with her husband Eric and three of their four children

'I was waiting for the perfect moment and opportunity, as far as location goes, and a spot opened up in The Gulch, and spots never open up in The Gulch,' she said of the Nashville neighborhood.' I was like, ‘That is it. That is the spot.’ That was a sign that it was time.'

Along with the flagship store in Nashville, she also has a second branch that's located near Destin, Florida, a city in northwest section of the Sunshine State, in the area known as the Panhandle.

After one of her songs attracted the attention of Mercury Records, the then Jessie James released her self-titled debut studio album in August 2009, and it proceeded to hit number 23 on the Billboard 200.