diff --git a/internal/theme/twentyfifteen/posts/detail.gohtml b/internal/theme/twentyfifteen/posts/detail.gohtml
index 10417a4..3c60d74 100644
--- a/internal/theme/twentyfifteen/posts/detail.gohtml
+++ b/internal/theme/twentyfifteen/posts/detail.gohtml
@@ -5,6 +5,11 @@
         <div id="primary" class="content-area">
             <main id="main" class="site-main">
                 <article class="{{ .post|postsFn .calPostClass}}">
+                    {{if .post.Thumbnail.Path }}
+                        <div class="post-thumbnail">
+                            <img width="{{.post.Thumbnail.Width}}" height="{{.post.Thumbnail.Height}}" src="{{.post.Thumbnail.Path}}" class="attachment-post-thumbnail size-post-thumbnail wp-post-image" alt="" decoding="async">
+                        </div>
+                    {{end}}
 
                     <header class="entry-header">
                         <h1 class="entry-title">{{.post.PostTitle}}</h1></header><!-- .entry-header -->
diff --git a/internal/theme/twentyfifteen/twentyfifteen.go b/internal/theme/twentyfifteen/twentyfifteen.go
index c0a0ffa..372dd4a 100644
--- a/internal/theme/twentyfifteen/twentyfifteen.go
+++ b/internal/theme/twentyfifteen/twentyfifteen.go
@@ -12,6 +12,7 @@ import (
 	"github.com/fthvgb1/wp-go/internal/theme/wp"
 	"github.com/fthvgb1/wp-go/internal/theme/wp/components"
 	"github.com/fthvgb1/wp-go/internal/theme/wp/components/widget"
+	"github.com/fthvgb1/wp-go/internal/wpconfig"
 	"strings"
 )
 
@@ -76,4 +77,11 @@ func configs(h *wp.Handle) {
 	h.PushHandleFn(constraints.AllStats, wp.NewHandleFn(customHeader, 10))
 	h.PushHandleFn(constraints.AllStats, wp.NewHandleFn(wp.IndexRender, 50))
 	h.PushHandleFn(constraints.Detail, wp.NewHandleFn(wp.DetailRender, 50))
+	h.PushHandleFn(constraints.Detail, wp.NewHandleFn(postThumb, 60))
+}
+
+func postThumb(h *wp.Handle) {
+	if h.Detail.Post.Thumbnail.Path != "" {
+		h.Detail.Post.Thumbnail = wpconfig.Thumbnail(h.Detail.Post.Thumbnail.OriginAttachmentData, "post-thumbnail", "")
+	}
 }
diff --git a/internal/theme/wp/calclass.go b/internal/theme/wp/calclass.go
index b974e64..03f20e5 100644
--- a/internal/theme/wp/calclass.go
+++ b/internal/theme/wp/calclass.go
@@ -110,12 +110,10 @@ func TermClass(term models.TermsMy) string {
 		termClass = strconv.FormatUint(term.TermTaxonomy.TermId, 10)
 	}
 	switch term.Taxonomy {
-	case "category":
-		return str.Join("category-", termClass)
 	case "post_tag":
 		return str.Join("tag-", termClass)
 	case "post_format":
 		return fmt.Sprintf("format-%s", strings.ReplaceAll(term.Slug, "post-format-", ""))
 	}
-	return fmt.Sprintf("%s-%d", term.Taxonomy, term.TermTaxonomy.TermId)
+	return str.Join(term.Taxonomy, "-", termClass)
 }
diff --git a/internal/theme/wp/detail.go b/internal/theme/wp/detail.go
index b147dd9..64fa5cc 100644
--- a/internal/theme/wp/detail.go
+++ b/internal/theme/wp/detail.go
@@ -66,7 +66,6 @@ func (d *DetailHandle) PasswordProject() {
 		if d.password != d.Post.PostPassword {
 			wpposts.PasswdProjectContent(&d.Post)
 		}
-		d.ginH["post"] = d.Post
 	}
 }
 func (d *DetailHandle) Comment() {
diff --git a/internal/wpconfig/thememods.go b/internal/wpconfig/thememods.go
index 0afbda9..a4f4067 100644
--- a/internal/wpconfig/thememods.go
+++ b/internal/wpconfig/thememods.go
@@ -82,8 +82,8 @@ func Thumbnail(metadata models.WpAttachmentMetadata, Type, host string, except .
 			FileSize: metadata.FileSize,
 		}
 	}
-	if _, ok := metadata.Sizes[Type]; ok {
-		r.Path = fmt.Sprintf("%s/wp-content/uploads/%s", host, metadata.File)
+	if siz, ok := metadata.Sizes[Type]; ok {
+		r.Path = fmt.Sprintf("%s/wp-content/uploads/%s", host, strings.ReplaceAll(metadata.File, filepath.Base(metadata.File), siz.File))
 		r.Width = metadata.Sizes[Type].Width
 		r.Height = metadata.Sizes[Type].Height